MESON Chess Problem Database

Problem Display
PID: 260712 (8/8/2pp3Q/K2PP2p/2pk2bR/2r5/1BPN1P2/3R1N2 w - - 0 1)

Borisenko, Ivan Dmitrovich

Shevchenko, Vitaly Ivanovich

Comm., Kapustin_55 JT, 2011

8/8/2pp3Q/K2PP2p/2pk2bR/2r5/1BPN1P2/3R1N2

#2

11 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Se4#
    • 1...Kxd5
      • 2.Qxd6#
    • 1...cxd5
      • 2.Qe3#
  • Tries
    • 1.Sf3+?
      • 1...Kc5
        • 2.Qxd6#
      • 1...Ke4!
    • 1.Bxc3+?
      • 1...Kc5
        • 2.Se4#
        • 2.Qxd6#
      • 1...Kxd5
        • 2.Qxd6#
      • 1...Kxc3!
    • 1.Rxg4+?
      • 1...Kc5
        • 2.Se4#
        • 2.Qxd6#
      • 1...Kxd5
        • 2.Qxd6#
      • 1...Kxe5
        • 2.Qg5#
        • 2.Qe6#
      • 1...hxg4!
    • 1.Qf4+?
      • 1...Kc5
        • 2.Se4#
      • 1...Kxd5!
    • 1.dxc6?
      • threat
        • 2.Qxd6#
      • 1...Kc5
        • 2.Qxd6#
      • 1...Kd5
        • 2.Qxd6#
      • 1...dxe5
        • 2.Qd6#
      • 1...d5
        • 2.Qe3#
      • 1...Kxe5!
  • Keys
    • 1.Sg3!
      • 1...Kc5
        • 2.Sde4#
      • 1...Kxd5
        • 2.Qxd6#
      • 1...Kxe5
        • 2.Sxc4#
      • 1...cxd5
        • 2.Qe3#
      • 1...dxe5
        • 2.Sb3#
      • 1...c5
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);N_GUARD,N_SPINB(d),N_SPINR(a),S_CUTB(d),S_FLIGHT::S(E)
    • K(c);N_SPINB(d),N_SPINR(a),OGATEB,P-FLIGHT,XP(I)::QAR1(K),XP(g)
    • P(f);SBLOCK,XP(I)::QAB1(K)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(c);N_GUARD,N_SPINB(d),N_SPINR(a),S_FLIGHT::QAB1(K),XP(g)
      • Refutation
        • K(c);N_SPINR(a),P-FLIGHT
    • Try
      • B(C);CHECK,XR(a)
      • Vars
        • K(c);N_GUARD,N_SPINB(d),P-FLIGHT,XP(I)::QAR1(K),XP(g)
      • Refutation
        • K(c);N_SPINB(d),S_FLIGHT,XB(C)
    • Try
      • R(G);CHECK,XB(d)
      • Vars
        • K(c);N_SPINR(a),P-FLIGHT,S_CUTP(e),XP(I)::QAR1(K),XP(g)
      • Refutation
        • P(e);XR(G)
    • Try
      • Q(K);CHECK,N_PINB(d)
      • Vars
        • K(c);N_SPINR(a),S_CUTB(d),S_FLIGHT::S(E)
      • Refutation
        • K(c);N_SPINR(a),P-FLIGHT,XP(I)
    • Try
      • P(I);XP(f)
      • Threat
        • QAR2(K),XP(g)
      • Vars
        • K(c);N_SPINB(d),N_SPINR(a),S_FLIGHT::QAB1(K),XP(g)
        • K(c);N_SPINB(d),N_SPINR(a),P-FLIGHT::QAR1(K),XP(g)
        • P(g);XP(J)::QAR2(K)
        • P(g);SBLOCK::QAB1(K)
      • Refutation
        • K(c);N_SPINB(d),S_FLIGHT,XP(J)
  • Actual
    • S(B);
    • Vars
      • K(c);N_GUARD,N_SPINB(d),N_SPINR(a),S_CUTB(d),S_FLIGHT::S(E)
      • K(c);N_SPINB(d),N_SPINR(a),OGATEB,P-FLIGHT,XP(I)::QAR1(K),XP(g)
      • K(c);N_GUARD,N_SPINB(d),S_FLIGHT,XP(J)::S(E),XP(b)
      • P(f);SBLOCK,XP(I)::QAB1(K)
      • P(g);SBLOCK,XP(J)::R(A)+S(E),DCHECK
      • P(f);SBLOCK::R(A)+S(E),DCHECK
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