MESON Chess Problem Database

Problem Display
PID: 27343 (7Q/5KB1/8/8/8/2R3pq/4N2k/6R1 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

7Q/5KB1/8/8/8/2R3pq/4N2k/6R1

#2

6 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Qh4
      • 2.Qxh4#
    • 1...Qh5+
      • 2.Qxh5#
    • 1...Qh6
      • 2.Qxh6#
    • 1...Qh7
      • 2.Qxh7#
    • 1...g2
      • 2.Be5#
      • 2.Rxh3#
      • 2.Qxh3#
  • Tries
    • 1.Kf6?
      • 1...Qh4+
        • 2.Qxh4#
      • 1...Qh6+
        • 2.Qxh6#
      • 1...Qh5
        • 2.Qxh5#
      • 1...Qh7
        • 2.Qxh7#
      • 1...g2
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Qxh8!
    • 1.Kg6?
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qh6+
        • 2.Qxh6#
      • 1...Qh7+
        • 2.Qxh7#
      • 1...Qh4
        • 2.Qxh4#
      • 1...g2
        • 2.Be5#
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Qxh8!
    • 1.Ke7?
      • 1...Qh4+
        • 2.Qxh4#
      • 1...Qh5
        • 2.Qxh5#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qh7
        • 2.Qxh7#
      • 1...g2
        • 2.Be5#
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Qxh8!
    • 1.Ke8?
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qh7
        • 2.Qxh7#
      • 1...g2
        • 2.Be5#
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Qxh8+!
    • 1.Kf8?
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh5
        • 2.Qxh5#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qh7
        • 2.Qxh7#
      • 1...g2
        • 2.Be5#
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Qxh8+!
    • 1.Kg8?
      • 1...Qh7+
        • 2.Qxh7#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh5
        • 2.Qxh5#
      • 1...Qh6
        • 2.Qxh6#
      • 1...g2
        • 2.Be5#
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Qxh8+!
    • 1.Bd4?
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qh7+
        • 2.Qxh7#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh6
        • 2.Qxh6#
      • 1...g2
        • 2.Be5#
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Qxh8!
    • 1.Be5?
      • threat
        • 2.Bxg3#
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qh7+
        • 2.Qxh7#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qxh8!
    • 1.Bf6?
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qh7+
        • 2.Qxh7#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh6
        • 2.Qxh6#
      • 1...g2
        • 2.Be5#
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Qxh8!
    • 1.Bf8?
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qh7+
        • 2.Qxh7#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh6
        • 2.Qxh6#
      • 1...g2
        • 2.Bd6#
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Qxh8!
    • 1.Rh1+?
      • 1...Kxh1
        • 2.Qxh3#
      • 1...Kg2!
    • 1.Rg2+?
      • 1...Kh1
        • 2.Qxh3#
      • 1...Kxg2!
    • 1.Rgxg3?
      • threat
        • 2.Qxh3#
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Kh1
        • 2.Qxh3#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qh7
        • 2.Qxh7#
      • 1...Qxh8!
    • 1.Rcc1?
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qh7
        • 2.Qxh7#
      • 1...g2
        • 2.Be5#
      • 1...Qxh8!
    • 1.Rc2?
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qh7
        • 2.Qxh7#
      • 1...g2
        • 2.Be5#
      • 1...Qxh8!
    • 1.Ra3?
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qh7
        • 2.Qxh7#
      • 1...g2
        • 2.Be5#
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Qxh8!
    • 1.Rb3?
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qh7
        • 2.Qxh7#
      • 1...g2
        • 2.Be5#
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Qxh8!
    • 1.Rd3?
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qh7
        • 2.Qxh7#
      • 1...g2
        • 2.Be5#
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Qxh8!
    • 1.Re3?
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qh7
        • 2.Qxh7#
      • 1...g2
        • 2.Be5#
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Qxh8!
    • 1.Rf3?
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qh7
        • 2.Qxh7#
      • 1...g2
        • 2.Be5#
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Qxh8!
    • 1.Rcxg3?
      • threat
        • 2.R3g2#
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qh7
        • 2.Qxh7#
      • 1...Qxh8!
    • 1.Rc4?
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qh4
        • 2.Rxh4#
        • 2.Qxh4#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qh7
        • 2.Qxh7#
      • 1...g2
        • 2.Be5#
      • 1...Qxh8!
    • 1.Rc5?
      • 1...Qh5+
        • 2.Rxh5#
        • 2.Qxh5#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qh7
        • 2.Qxh7#
      • 1...g2
        • 2.Be5#
      • 1...Qxh8!
    • 1.Rc6?
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh6
        • 2.Rxh6#
        • 2.Qxh6#
      • 1...Qh7
        • 2.Qxh7#
      • 1...g2
        • 2.Be5#
      • 1...Qxh8!
    • 1.Rc7?
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qh7
        • 2.Qxh7#
      • 1...g2
        • 2.Be5#
      • 1...Qxh8!
    • 1.Qh4?
      • 1...g2
        • 2.Be5#
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Qxh4!
    • 1.Qh5?
      • 1...Qh4
        • 2.Qxh4#
      • 1...g2
        • 2.Be5#
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Qxh5+!
    • 1.Qh6?
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qh4
        • 2.Qxh4#
      • 1...g2
        • 2.Be5#
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Qxh6!
    • 1.Qh7?
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh6
        • 2.Qxh6#
      • 1...g2
        • 2.Be5#
        • 2.Rxh3#
        • 2.Qxh3#
      • 1...Qxh7!
  • Keys
    • 1.Rc8!
      • 1...Qh5+
        • 2.Qxh5#
      • 1...Qxh8
        • 2.Rxh8#
      • 1...Qh4
        • 2.Qxh4#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qh7
        • 2.Qxh7#
      • 1...g2
        • 2.Be5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(c);OGATEB::QAR2(F),XQ(c)
    • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
    • Q(c);OGATEB::QAR(F),XQ(c)
    • Q(c);OGATEB,P_PINB(E)::QAR(F),XQ(c)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • Q(c);CHECK,OGATEB::QAR2(F),XQ(c)
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),P_PINB(E),XQ(F)
    • Try
      • K(D);S_FLIGHT
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • K(D);P-FLIGHT
      • Vars
        • Q(c);CHECK,OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB,P_PINB(E)::QAR(F),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • K(D);S_FLIGHT
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
      • Refutation
        • Q(c);CHECK,N_SPINQ(c),XQ(F)
    • Try
      • K(D);P-FLIGHT
      • Vars
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB,P_PINB(E)::QAR(F),XQ(c)
      • Refutation
        • Q(c);CHECK,N_SPINQ(c),XQ(F)
    • Try
      • K(D);S_FLIGHT
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
      • Refutation
        • Q(c);CHECK,N_SPINQ(c),XQ(F)
    • Try
      • B(E);
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • B(E);P_PINP(b)
      • Threat
        • B(E),XP(b)
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • B(E);
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • B(E);
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • R(A);CHECK
      • Vars
        • K(a);P-FLIGHT,XR(A)::QAR2(F),XQ(c)
      • Refutation
        • K(a);N_SPINQ(c),P-FLIGHT
    • Try
      • R(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(F),XQ(c)
      • Refutation
        • K(a);N_SPINQ(c),P-FLIGHT,XR(A)
    • Try
      • R(A);XP(b)
      • Threat
        • QAR1(F),XQ(c)
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • K(a);P-FLIGHT::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB,P_PINB(E)::QAR(F),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • R(C);
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB,P_PINB(E)::QAR(F),XQ(c)
        • P(b);OGATEB::B(E)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • R(C);
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB,P_PINB(E)::QAR(F),XQ(c)
        • P(b);OGATEB::B(E)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • R(C);
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB,P_PINB(E)::QAR(F),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • R(C);
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB,P_PINB(E)::QAR(F),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • R(C);
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB,P_PINB(E)::QAR(F),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • R(C);
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB,P_PINB(E)::QAR(F),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • R(C);
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB,P_PINB(E)::QAR(F),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • R(C);XP(b)
      • Threat
        • DUALS(3)
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB,P_PINB(E)::QAR(F),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • R(C);
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB,P_PINB(E)::QAR(F),XQ(c)
        • P(b);OGATEB::B(E)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • R(C);
      • Vars
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB,P_PINB(E)::QAR(F),XQ(c)
        • P(b);OGATEB::B(E)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • R(C);
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB,P_PINB(E)::QAR(F),XQ(c)
        • P(b);OGATEB::B(E)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • R(C);
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB,P_PINB(E)::QAR(F),XQ(c)
        • P(b);OGATEB::B(E)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • Q(F);
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • Q(F);
      • Vars
        • Q(c);OGATEB::QAR2(F),XQ(c)
      • Refutation
        • Q(c);CHECK,N_SPINQ(c),XQ(F)
    • Try
      • Q(F);
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),XQ(F)
    • Try
      • Q(F);
      • Vars
        • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
        • Q(c);OGATEB::QAR2(F),XQ(c)
        • Q(c);OGATEB::QAR(F),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),P_PINB(E),XQ(F)
  • Actual
    • R(C);
    • Vars
      • Q(c);CHECK,OGATEB::QAR(F),XQ(c)
      • Q(c);N_SPINQ(c),OGATE,XQ(F)::R(C),XQ(c)
      • Q(c);OGATEB::QAR2(F),XQ(c)
      • Q(c);OGATEB::QAR(F),XQ(c)
      • Q(c);OGATEB,P_PINB(E)::QAR(F),XQ(c)
      • P(b);OGATEB::B(E)
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