MESON Chess Problem Database

Problem Display
PID: 39682 (1n2KB1r/q1R1P2p/2Pkp3/Q2b4/1NnR1P2/3N4/5b2/8 w - - 0 1)

Morse, Christopher Jeremy

5th HM., The Problemist, 2001

1n2KB1r/q1R1P2p/2Pkp3/Q2b4/1NnR1P2/3N4/5b2/8

#2

10 + 9

56 The Problemist 2003

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc7
      • 2.Qc5#
    • 1...Rxf8+
      • 2.exf8Q#
      • 2.exf8B#
    • 1...Se5
      • 2.fxe5#
    • 1...Sxc6
      • 2.Rxc6#
  • Tries
    • 1.Kd8?
      • threat
        • 2.e8S#
      • 1...Qxc7+
        • 2.Qxc7#
      • 1...Rxf8+
        • 2.exf8Q#
        • 2.exf8B#
      • 1...Sxc6+
        • 2.Rxc6#
      • 1...e5
        • 2.Qxd5#
      • 1...Bh4!
    • 1.Rxa7?
      • threat
        • 2.Qc7#
        • 2.Qc5#
      • 1...Rxf8+
        • 2.exf8Q#
        • 2.exf8B#
      • 1...Bxd4
        • 2.Qc7#
      • 1...e5
        • 2.Qxd5#
      • 1...Sb6
        • 2.Qc5#
      • 1...Sa6
        • 2.Rd7#
        • 2.Qd8#
      • 1...Sd7
        • 2.Rxd7#
        • 2.Qc7#
      • 1...Sxa5!
    • 1.Qxd5+?
      • 1...Kxc7
        • 2.Qd8#
      • 1...exd5!
  • Keys
    • 1.Kf7!
      • threat
        • 2.e8S#
      • 1...Rxf8+
        • 2.exf8Q#
        • 2.exf8B#
      • 1...Se5+
        • 2.fxe5#
      • 1...e5+
        • 2.Rxd5#
      • 1...Qxc7
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(f);N_GUARD,SBLOCK,XR(G)::QAB1(E)
    • R(i);CHECK,OGATE,XB(J)::PXR(i)=Q
    • S(b);OGATE::P(D),XS(b)
    • S(h);OGATE,XP(F)::R1(G),XS(h)
  • Tries
    • Try
      • K(I);P-FLIGHT
      • Threat
        • P=S
      • Vars
        • Q(f);CHECK,OGATE,XR(G)::QAB1(E),XQ(f)
        • R(i);CHECK,OGATE,XB(J)::PXR(i)=Q
        • S(h);CHECK,OGATE,XP(F)::R1(G),XS(h)
        • P(e);N_GUARD::QAR1(E),XB(c)
      • Refutation
        • B(a);P_PINP(H)
    • Try
      • R(G);XQ(f)
      • Threat
        • DUALS(2)
      • Vars
        • R(i);CHECK,OGATE,XB(J)::PXR(i)=Q
        • B(a);N_SPINB(c),XR(C)::QAB1(E)
        • P(e);N_GUARD::QAR1(E),XB(c)
        • S(b);::QAB1(E)
      • Refutation
        • S(b);XQ(E)
    • Try
      • Q(E);CHECK,XB(c)
      • Vars
        • K(d);OGATE,S_FLIGHT,XR(G)::QAB1(E)
      • Refutation
        • P(e);P_SPINP(e),XQ(E)
  • Actual
    • K(I);N_SPINB(J),S_FLIGHT
    • Threat
      • P=S
    • Vars
      • R(i);CHECK,OGATE,XB(J)::PXR(i)=Q
      • S(b);CHECK,OGATE::P(D),XS(b)
      • P(e);CHECK,N_GUARD::R1(C),XB(c)
      • Q(f);N_GUARD,P_PINP(H),SBLOCK,XR(G)::QAB1(E)
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