MESON Chess Problem Database

Problem Display
PID: 32658 (5b2/8/1N1PRp2/1pB1p3/1RqPk3/2pN3Q/8/6K1 w - - 0 1)

Morse, Christopher Jeremy

Correspondence Chess, 2001

5b2/8/1N1PRp2/1pB1p3/1RqPk3/2pN3Q/8/6K1

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe6
      • 2.d5#
    • 1...Qxd4+
      • 2.Rxd4#
    • 1...Qxc5
      • 2.dxc5#
    • 1...f5
      • 2.Rxe5#
  • Tries
    • 1.Kf2?
      • threat
        • 2.Qf3#
      • 1...Qxd4+
        • 2.Rxd4#
      • 1...Qxd3
        • 2.Qg4#
      • 1...Qa2+!
  • Keys
    • 1.dxe5!
      • threat
        • 2.exf6#
      • 1...Qd4+
        • 2.Rxd4#
      • 1...Bxd6
        • 2.exd6#
      • 1...fxe5
        • 2.Rxe5#
      • 1...f5
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_SPINP(e),XR(I)::R(D)+P(E)
    • Q(b);CHECK,OGATE,P_SPINQ(b),XP(E)::R1(D),XQ(b)
    • Q(b);OGATE,P_PINP(E),XB(F)::R(D)+P(E),XQ(b)
    • P(f);N_GUARD::R1(I),XP(e)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • QAB1(C)
      • Vars
        • Q(b);CHECK,OGATE,P_SPINQ(b),XP(E)::R1(D),XQ(b)
        • Q(b);SBLOCK,XS(B)::QAR2(C)
      • Refutation
        • Q(b);CHECK
  • Actual
    • P(E);P_PINQ(b),XP(e)
    • Threat
      • R(I)+P(E),XP(f)
    • Vars
      • Q(b);CHECK,OGATE::R1(D),XQ(b)
      • B(g);OGATE,XP(H)::R(I)+P(E),XB(g)
      • P(f);OGATE,P_SPINP(f),XP(E)::R1(I),XP(f)
      • P(f);SBLOCK::QAR1(C)
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