MESON Chess Problem Database

Problem Display
PID: 96430 (1KQ4n/2p3PN/3RP1P1/4kp2/Rb3NP1/5P2/B2q2p1/6B1 w - - 0 1)

Gvozdjak, Peter

US Problem Bulletin, 1991

1KQ4n/2p3PN/3RP1P1/4kp2/Rb3NP1/5P2/B2q2p1/6B1

#2

13 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd6
      • 2.Qxc7#
    • 1...Qxf4
      • 2.Rd5#
    • 1...Bxd6
      • 2.gxh8Q#
      • 2.gxh8B#
  • Tries
    • 1.Sd3+?
      • 1...Kxd6
        • 2.Qd7#
        • 2.Qxc7#
      • 1...Qxd3!
    • 1.Bh2?
      • threat
        • 2.Sd3#
      • 1...Kxd6
        • 2.Qxc7#
      • 1...Qxf4
        • 2.Rd5#
      • 1...Qxd6
        • 2.gxh8Q#
        • 2.gxh8B#
      • 1...cxd6
        • 2.gxh8Q#
        • 2.gxh8B#
      • 1...Qd5
        • 2.Rxd5#
      • 1...Qd3
        • 2.Sxd3#
      • 1...fxg4!
    • 1.gxh8Q+?
      • 1...Kxd6
        • 2.Qd7#
        • 2.Qxc7#
      • 1...Kxf4!
    • 1.gxh8B+?
      • 1...Kxd6
        • 2.Qd7#
        • 2.Qxc7#
      • 1...Kxf4!
  • Keys
    • 1.Qxc7!
      • threat
        • 2.Rd5#
      • 1...Kxf4
        • 2.Rd3#
      • 1...Qxf4
        • 2.gxh8Q#
        • 2.gxh8B#
      • 1...Qxd6
        • 2.Sd3#
      • 1...Bxd6
        • 2.gxh8Q#
        • 2.gxh8B#
      • 1...Qd5
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(d);OGATEB,S_FLIGHT,XR(G)::QAB1(M),XP(f)
    • Q(a);N_GUARD,SBLOCK,XS(E)::R1(G)
    • B(c);SBLOCK,XR(G)::PXS(g)=Q
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • Q(a);XS(E)
    • Try
      • B(A);
      • Threat
        • B(A)+S(E),DCHECK
      • Vars
        • K(d);OGATEB,S_FLIGHT,XR(G)::QAB1(M),XP(f)
        • Q(a);N_GUARD,P_SPINQ(a),XS(E)::R1(G)
        • Q(a);SBLOCK,XR(G)::PXS(g)=Q
        • P(f);SBLOCK,XR(G)::PXS(g)=Q
        • Q(a);N_GUARD::R1(G),XQ(a)
        • Q(a);::B(A)+S(E),DCHECK,XQ(a)
      • Refutation
        • P(e);XP(F)
    • Try
      • P(J);CHECK,XS(g)
      • Refutation
        • K(d);P_SPINB(c),S_FLIGHT,XS(E)
    • Try
      • P(J);CHECK,XS(g)
      • Refutation
        • K(d);P_SPINB(c),S_FLIGHT,XS(E)
  • Actual
    • Q(M);XP(f)
    • Threat
      • QAB(M)+R(G),DCHECK
    • Vars
      • K(d);P_SPINB(c),S_FLIGHT,XS(E)::QAB(M)+R(G)
      • Q(a);SBLOCK,XS(E)::PXS(g)=Q
      • Q(a);N_GUARD,P_PINQ(M),P_SPINQ(a),XR(G)::S(E)
      • B(c);P_PINQ(M),P_SPINB(c),XR(G)::PXS(g)=Q
      • Q(a);::QAB(M)+R(G),DCHECK,XQ(a)
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