MESON Chess Problem Database

Problem Display
PID: 23936 (K7/2p3Q1/p1kN2R1/P7/1nB5/2R5/p7/1qrr4 w - - 0 1)

Quack, Godfrey C

The Two-move Chess Problems of GCQ, 1996

K7/2p3Q1/p1kN2R1/P7/1nB5/2R5/p7/1qrr4

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Sb7#
    • 1...Re1
      • 2.Se4#
    • 1...Rh1
      • 2.Se4#
    • 1...Rd5
      • 2.Bb5#
    • 1...Sc2
      • 2.Bxa2#
      • 2.Bb3#
      • 2.Bg8#
    • 1...Sd3
      • 2.Se4#
      • 2.Sb7#
    • 1...Sd5
      • 2.Bb5#
  • Tries
    • 1.Sb5+?
      • 1...Qxg6
        • 2.Qxc7#
      • 1...Rd6
        • 2.Qxc7#
      • 1...Kc5!
    • 1.Se8+?
      • 1...Qxg6
        • 2.Qxc7#
      • 1...Rd6
        • 2.Qxc7#
      • 1...Kc5!
    • 1.Be6+?
      • 1...Kxd6
        • 2.Qxc7#
      • 1...Rxc3!
    • 1.Qe5?
      • threat
        • 2.Bb5#
      • 1...Kd7
        • 2.Qe8#
      • 1...Rxc3!
    • 1.Qd7+?
      • 1...Kc5
        • 2.Sb7#
      • 1...Kxd7!
  • Keys
    • 1.Kb8!
      • threat
        • 2.Qxc7#
      • 1...Sc2+
        • 2.Bb3#
      • 1...Sd3+
        • 2.Sb7#
      • 1...Sd5+
        • 2.Bb5#
      • 1...Kc5
        • 2.Sb7#
      • 1...cxd6
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • K(g);P-FLIGHT::S(D)
    • R(c);N_GUARD::R(E)+S(D)
    • R(c);SBLOCK::R(A)+B(B),DCHECK
    • S(e);SBLOCK::R(A)+B(B),DCHECK
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • Q(a);XR(E)::QAR1(F),XP(h)
        • R(c);P_SPINR(c)::QAR1(F),XP(h)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • Q(a);XR(E)::QAR1(F),XP(h)
        • R(c);P_SPINR(c)::QAR1(F),XP(h)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • B(B);CHECK
      • Vars
        • K(g);P-FLIGHT,XS(D)::QAB1(F),XP(h)
      • Refutation
        • R(b);XR(A)
    • Try
      • Q(F);
      • Threat
        • R(A)+B(B),DCHECK
      • Vars
        • K(g);S_FLIGHT::QAB1(F)
      • Refutation
        • R(b);XR(A)
    • Try
      • Q(F);CHECK
      • Vars
        • K(g);P-FLIGHT::S(D)
      • Refutation
        • K(g);S_FLIGHT,XQ(F)
  • Actual
    • K(G);P-FLIGHT
    • Threat
      • QAR1(F),XP(h)
    • Vars
      • S(e);CHECK,S_CUTR(b)::R(A)+B(B)
      • S(e);CHECK,S_CUTQ(a),S_CUTR(c)::R(E)+S(D)
      • S(e);CHECK,SBLOCK::R(A)+B(B),DCHECK
      • K(g);P-FLIGHT::S(D)
      • P(h);P_SPINP(h),XS(D)::QAR1(F)
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