MESON Chess Problem Database

Problem Display
PID: 68718 (1K4BB/5N2/8/3kpr1R/2R2b2/1Qp1p2b/8/8 w - - 0 1)

Hicks, Geoffrey K

The Problemist, 1966

1K4BB/5N2/8/3kpr1R/2R2b2/1Qp1p2b/8/8

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Rc7#
    • 1...e4+
      • 2.Rc7#
  • Tries
    • 1.Sxe5+?
      • 1...Kd6
        • 2.Qa3#
        • 2.Qb4#
      • 1...Rf7!
    • 1.Rxc3+?
      • 1...Kd4
        • 2.Qc4#
      • 1...Ke4!
    • 1.Rb4+?
      • 1...Kc5
        • 2.Qc4#
      • 1...Kc6!
    • 1.Rc5+?
      • 1...Kd4
        • 2.Qc4#
        • 2.Qd5#
      • 1...Ke4
        • 2.Qd5#
      • 1...Kxc5!
    • 1.Rc7+?
      • 1...Kd4
        • 2.Qc4#
      • 1...Ke4!
    • 1.Rc8+?
      • 1...Kd4
        • 2.Qc4#
      • 1...Ke4!
    • 1.Qd1+?
      • 1...Ke6
        • 2.Qd6#
      • 1...Kxc4!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qc6#
      • 1...e4+
        • 2.Sd6#
      • 1...Kxc4
        • 2.Sxe5#
      • 1...Rf6
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(e);S_FLIGHT::QAB(A)+R(B)
    • P(f);CHECK,P_SPINR(g),SBLOCK::QAB(A)+R(B)
  • Tries
    • Try
      • S(D);CHECK,P_SPINS(D),XP(f)
      • Refutation
        • R(g);P_SPINR(g)
    • Try
      • R(B);CHECK,XP(a)
      • Vars
        • K(e);P-FLIGHT,P_SPINP(f)::QAR1(A)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR1(A)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB1(A)
      • Refutation
        • K(e);P-FLIGHT,XR(B)
    • Try
      • R(B);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINP(f)::QAR1(A)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINP(f)::QAR1(A)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(e);S_FLIGHT,XR(B)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • P(f);CHECK,P_SPINR(g)::B(F)+S(D)
      • K(e);S_FLIGHT,XR(B)::B(F)+S(D),DCHECK,XP(f)
      • R(g);P_SPINP(f)::R1(B)
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