MESON Chess Problem Database

Problem Display
PID: 225823 (2N4Q/1p2N1n1/1Pp3p1/2R3P1/P1nkB3/2R3P1/P1P3PB/2K5 w - - 0 1)

Valuska, Jan

1st HM., Praca, 1996

2N4Q/1p2N1n1/1Pp3p1/2R3P1/P1nkB3/2R3P1/P1P3PB/2K5

#2

15 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qh4#
  • Tries
    • 1.Sxc6+?
      • 1...Kxc3
        • 2.Qxg7#
      • 1...Kxe4
        • 2.Qh4#
      • 1...Kxc5
        • 2.Bg1#
        • 2.Qf8#
      • 1...bxc6!
    • 1.Bg1+?
      • 1...Kxe4
        • 2.R3xc4#
        • 2.Qh4#
      • 1...Se3
        • 2.R3c4#
      • 1...Kxc3!
    • 1.Bd5?
      • 1...Kxc3
        • 2.Rxc4#
      • 1...Kxc5
        • 2.Rxc4#
      • 1...Ke5
        • 2.Qxg7#
      • 1...Sxb6
        • 2.Qxg7#
      • 1...Sb2
        • 2.Qxg7#
      • 1...Sd2
        • 2.Qxg7#
      • 1...Sa3
        • 2.Qxg7#
      • 1...Se3
        • 2.Qxg7#
      • 1...Sa5
        • 2.Qxg7#
      • 1...Se5
        • 2.Bg1#
      • 1...Sd6
        • 2.Qxg7#
      • 1...cxd5!
    • 1.Rd3+?
      • 1...Kxe4
        • 2.Qh4#
      • 1...Kxc5!
    • 1.Qxg7+?
      • 1...Kxe4
        • 2.R5xc4#
      • 1...Se5
        • 2.R5c4#
        • 2.Qxe5#
      • 1...Kxc5!
    • 1.Qd8+?
      • 1...Kxc3
        • 2.Qd2#
      • 1...Kxe4
        • 2.Qd3#
      • 1...Kxc5
        • 2.Qd6#
      • 1...Sd6!
  • Keys
    • 1.Bd3!
      • 1...Kxc3
        • 2.Rxc4#
      • 1...Ke3
        • 2.Bg1#
      • 1...Kxc5
        • 2.Rxc4#
      • 1...Sxb6
        • 2.Bg1#
      • 1...Sb2
        • 2.Bg1#
      • 1...Sd2
        • 2.Bg1#
      • 1...Sa3
        • 2.Bg1#
      • 1...Se3
        • 2.Qxg7#
      • 1...Sa5
        • 2.Bg1#
      • 1...Se5
        • 2.Bg1#
      • 1...Sd6
        • 2.Bg1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 1
  • Sets
    • K(b);N_SPINS(f),OGATEB,P-FLIGHT,XB(I)::QAR(O)
  • Tries
    • Try
      • S(M);CHECK,XP(c)
      • Vars
        • K(b);N_SPINS(f),P_SPINS(a),S_FLIGHT,XR(F)::QAB(O),XS(f)
        • K(b);N_SPINS(f),P-FLIGHT,XB(I)::QAR(O)
      • Refutation
        • P(e);XS(M)
    • Try
      • B(E);CHECK
      • Vars
        • S(a);N_SPINS(f),P_SPINS(a)::R1(F)
      • Refutation
        • K(b);N_SPINS(f),P_SPINS(a),S_FLIGHT,XR(F)
    • Try
      • B(I);
      • Vars
        • K(b);N_SPINS(f),P_SPINS(a),S_FLIGHT,XR(F)::R1(J),XS(a)
        • K(b);N_SPINS(f),P_SPINS(a),S_FLIGHT,XR(J)::R1(F),XS(a)
        • K(b);S_FLIGHT::QAB(O),XS(f)
        • S(a);N_GUARD,XP(L)::QAB(O),XS(f)
        • S(a);N_GUARD::QAB(O),XS(f)
        • S(a);N_GUARD,N_SPINS(f),SBLOCK::B(E)
      • Refutation
        • P(c);XB(I)
    • Try
      • R(F);CHECK
      • Vars
        • K(b);N_SPINS(f),P-FLIGHT,XB(I)::QAR(O)
      • Refutation
        • K(b);N_SPINS(f),S_FLIGHT,XR(J)
    • Try
      • Q(O);CHECK,XS(f)
      • Vars
        • K(b);P-FLIGHT,XB(I)::R(J),XS(a)
      • Refutation
        • K(b);P_SPINS(a),S_FLIGHT,XR(J)
    • Try
      • Q(O);CHECK,N_PINS(f)
      • Vars
        • K(b);OGATE,P_SPINS(a),S_FLIGHT,XR(F)::QAB1(O)
        • K(b);OGATE,P-FLIGHT,XB(I)::QAB1(O)
        • K(b);P_SPINS(a),S_FLIGHT,XR(J)::QAB1(O)
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • B(I);
    • Vars
      • K(b);N_SPINS(f),P_SPINS(a),S_FLIGHT,XR(F)::R1(J),XS(a)
      • K(b);N_SPINS(f),S_FLIGHT::B(E)
      • K(b);N_SPINS(f),P_SPINS(a),S_FLIGHT,XR(J)::R1(F),XS(a)
      • S(a);N_GUARD,XP(L)::B(E)
      • S(a);N_GUARD::B(E)
      • S(a);N_GUARD,SBLOCK::QAB(O),XS(f)
      • S(a);N_GUARD,N_SPINS(f)::B(E)
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