MESON Chess Problem Database

Problem Display
PID: 97008 (8/2p5/2N1Q3/4p3/1p2pp2/1p2PkrR/1K5R/8 w - - 0 1)

Gruber, Bratoljub

Problem (Zagreb), 1954

8/2p5/2N1Q3/4p3/1p2pp2/1p2PkrR/1K5R/8

#2

6 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe3
      • 2.Qxb3#
    • 1...Rxh3
      • 2.Qxh3#
    • 1...fxe3
      • 2.Qf5#
  • Tries
    • 1.Ka1?
      • 1...Kxe3
        • 2.Qxb3#
      • 1...Rxh3
        • 2.Qxh3#
      • 1...fxe3
        • 2.Qf5#
      • 1...b2+!
    • 1.Kb1?
      • 1...Kxe3
        • 2.Qxb3#
      • 1...Rxh3
        • 2.Qxh3#
      • 1...fxe3
        • 2.Qf5#
      • 1...b2!
    • 1.Kc1?
      • 1...Kxe3
        • 2.Qxb3#
      • 1...Rxh3
        • 2.Qxh3#
      • 1...fxe3
        • 2.Qf5#
      • 1...b2+!
    • 1.Kxb3?
      • 1...Rxh3
        • 2.Qxh3#
      • 1...fxe3
        • 2.Qf5#
      • 1...Kxe3!
    • 1.Rc2?
      • 1...Kxe3
        • 2.Qxb3#
      • 1...Rxh3
        • 2.Qxh3#
      • 1...fxe3
        • 2.Qf5#
      • 1...bxc2!
    • 1.Rd2?
      • 1...Rxh3
        • 2.Qxh3#
      • 1...fxe3
        • 2.Qf5#
      • 1...Kxe3!
    • 1.Rxg3+?
      • 1...Kxg3
        • 2.Qh3#
      • 1...fxg3!
    • 1.Qg4+?
      • 1...Kxe3
        • 2.Qe2#
      • 1...Kxg4!
    • 1.Qf5?
      • 1...Rxh3
        • 2.Qxh3#
      • 1...Kxe3!
    • 1.Qd7?
      • 1...Rxh3
        • 2.Qxh3#
      • 1...fxe3
        • 2.Qf5#
      • 1...Kxe3!
    • 1.Qf7?
      • 1...Kxe3
        • 2.Qxb3#
      • 1...Kg4
        • 2.Qh5#
      • 1...Rxh3!
    • 1.Qc8?
      • 1...Rxh3
        • 2.Qxh3#
      • 1...fxe3
        • 2.Qf5#
      • 1...Kxe3!
    • 1.Qg8?
      • 1...Kxe3
        • 2.Qxb3#
      • 1...fxe3
        • 2.Qxg3#
      • 1...Rxh3!
    • 1.Qxe5?
      • threat
        • 2.Qxf4#
      • 1...Kg4
        • 2.Qxf4#
        • 2.Qh5#
      • 1...fxe3
        • 2.Rxg3#
        • 2.Qxg3#
        • 2.Qf5#
      • 1...Kxe3!
  • Keys
    • 1.Qh6!
      • 1...Kxe3
        • 2.Rxg3#
      • 1...Kg4
        • 2.Qh5#
      • 1...Rxh3
        • 2.Qxh3#
      • 1...fxe3
        • 2.Sxe5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,P-FLIGHT,XP(C)::QAR(F),XP(a)
    • R(c);N_SPINR(c),OGATE,XR(D)::QAR2(F),XR(c)
    • P(f);OGATEB,SBLOCK,XP(C)::QAR2(F)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(C)::QAR(F),XP(a)
        • R(c);N_SPINR(c),OGATE,XR(D)::QAR2(F),XR(c)
        • P(f);OGATEB,SBLOCK,XP(C)::QAR2(F)
      • Refutation
        • P(a);CHECK
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(C)::QAR(F),XP(a)
        • R(c);N_SPINR(c),OGATE,XR(D)::QAR2(F),XR(c)
        • P(f);OGATEB,SBLOCK,XP(C)::QAR2(F)
      • Refutation
        • P(a);
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(C)::QAR(F),XP(a)
        • R(c);N_SPINR(c),OGATE,XR(D)::QAR2(F),XR(c)
        • P(f);OGATEB,SBLOCK,XP(C)::QAR2(F)
      • Refutation
        • P(a);CHECK
    • Try
      • K(A);P-FLIGHT,XP(a)
      • Vars
        • R(c);N_SPINR(c),OGATE,XR(D)::QAR2(F),XR(c)
        • P(f);OGATEB,SBLOCK,XP(C)::QAR2(F)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
    • Try
      • R(B);
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(C)::QAR(F),XP(a)
        • R(c);N_SPINR(c),OGATE,XR(D)::QAR2(F),XR(c)
        • P(f);OGATEB,SBLOCK,XP(C)::QAR2(F)
      • Refutation
        • P(a);XR(B)
    • Try
      • R(B);
      • Vars
        • R(c);N_SPINR(c),OGATE,XR(D)::QAR2(F),XR(c)
        • P(f);OGATEB,SBLOCK,XP(C)::QAR2(F)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
    • Try
      • R(D);CHECK,XR(c)
      • Vars
        • K(b);P-FLIGHT,XR(D)::QAR1(F)
      • Refutation
        • P(f);XR(D)
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT,XP(C)::QAR1(F)
      • Refutation
        • K(b);N_SPINR(c),S_FLIGHT,XQ(F)
    • Try
      • Q(F);P_PINP(f)
      • Vars
        • R(c);N_SPINR(c),OGATE,XR(D)::QAR2(F),XR(c)
      • Refutation
        • K(b);N_SPINP(f),P-FLIGHT,XP(C)
    • Try
      • Q(F);
      • Vars
        • R(c);N_SPINR(c),OGATE,XR(D)::QAR2(F),XR(c)
        • P(f);OGATEB,SBLOCK,XP(C)::QAR2(F)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
    • Try
      • Q(F);P_PINP(f)
      • Vars
        • K(b);N_SPINP(f),OGATEB,P-FLIGHT,XP(C)::QAR(F),XP(a)
        • K(b);N_SPINP(f),N_SPINR(c),S_FLIGHT::QAB1(F)
      • Refutation
        • R(c);N_SPINR(c),XR(D)
    • Try
      • Q(F);
      • Vars
        • R(c);N_SPINR(c),OGATE,XR(D)::QAR2(F),XR(c)
        • P(f);OGATEB,SBLOCK,XP(C)::QAR2(F)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
    • Try
      • Q(F);
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(C)::QAR(F),XP(a)
        • P(f);N_GUARD,SBLOCK,XP(C)::QAR1(F),XR(c)
      • Refutation
        • R(c);N_SPINR(c),XR(D)
    • Try
      • Q(F);XP(g)
      • Threat
        • QAR1(F),XP(f)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(e),XP(C)
  • Actual
    • Q(F);
    • Vars
      • K(b);P-FLIGHT,P_SPINP(f),XP(C)::R(D),XR(c)
      • K(b);N_SPINR(c),S_FLIGHT::QAB1(F)
      • R(c);N_SPINR(c),OGATE,XR(D)::QAR2(F),XR(c)
      • P(f);XP(C)::S(E),XP(g)
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