MESON Chess Problem Database

Problem Display
PID: 9928 (1B6/8/8/KR4p1/R2bk3/2r5/2PPp1P1/1Q6 w - - 0 1)

Morse, Christopher Jeremy

The Guardian, 1960

1B6/8/8/KR4p1/R2bk3/2r5/2PPp1P1/1Q6

#2

8 + 5

3174 The Two-move Chess Problem Tradition and Development 1966
6479 Problemschach (Sidler) 1968

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2
      • 2.Qxc2#
    • 1...Ra3
      • 2.c3#
    • 1...Rb3
      • 2.cxb3#
    • 1...Rd3
      • 2.cxd3#
    • 1...Rc4
      • 2.c3#
    • 1...Rc5
      • 2.c4#
    • 1...Rc6
      • 2.c3#
      • 2.c4#
    • 1...Rc8
      • 2.c3#
      • 2.c4#
  • Tries
    • 1.Bh2?
      • threat
        • 2.Re5#
      • 1...Rxc2
        • 2.Qxc2#
      • 1...Rc5
        • 2.c4#
      • 1...Rc4
        • 2.c3#
      • 1...Rg3!
    • 1.Bg3?
      • threat
        • 2.Re5#
      • 1...Rxc2
        • 2.Qxc2#
      • 1...Rc5
        • 2.c4#
      • 1...Rc4
        • 2.c3#
      • 1...Rxg3!
    • 1.Rc5?
      • threat
        • 2.Qb7#
      • 1...Rxc2
        • 2.Qxc2#
      • 1...Rb3
        • 2.cxb3#
      • 1...Rxc5+!
    • 1.Qb3?
      • threat
        • 2.Qd5#
        • 2.Qe6#
      • 1...Rxc2
        • 2.Qxc2#
        • 2.Qe3#
        • 2.Qf3#
      • 1...Rc5
        • 2.Qf3#
      • 1...Rc7
        • 2.Qe3#
        • 2.Qf3#
      • 1...Rc4
        • 2.Qd3#
        • 2.Qf3#
      • 1...Rc6
        • 2.Qd5#
        • 2.Qd3#
        • 2.Qe3#
        • 2.Qf3#
      • 1...Rxb3!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qh7#
      • 1...Rc5
        • 2.g4#
      • 1...Rc7
        • 2.g3#
      • 1...Rf3
        • 2.gxf3#
      • 1...Rh3
        • 2.gxh3#
      • 1...Rc6
        • 2.g3#
        • 2.g4#

This is after

There are these versions: 145164

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(b);OGATE,P_SPINR(b),XP(B)::QAB(A),XR(b)
    • R(b);OGATE,P_PINR(E)::QAB(A)+P(B)
    • R(b);OGATE::QAB(A)+P(B),XR(b)
    • R(b);OGATE::P(B),XR(b)
    • R(b);N_SPINB(c),OGATE::QAB(A)+P(B)
    • R(b);OGATE,P_PINR(G)::QAB(A)+P(B)
  • Tries
    • Try
      • B(H);
      • Threat
        • R1(G)
      • Vars
        • R(b);OGATE,P_SPINR(b),XP(B)::QAB(A),XR(b)
        • R(b);OGATE,P_PINR(G)::QAB(A)+P(B)
        • R(b);N_SPINB(c),OGATE::QAB(A)+P(B)
      • Refutation
        • R(b);
    • Try
      • B(H);
      • Threat
        • R1(G)
      • Vars
        • R(b);OGATE,P_SPINR(b),XP(B)::QAB(A),XR(b)
        • R(b);OGATE,P_PINR(G)::QAB(A)+P(B)
        • R(b);N_SPINB(c),OGATE::QAB(A)+P(B)
      • Refutation
        • R(b);XB(H)
    • Try
      • R(G);
      • Threat
        • QAB(A)
      • Vars
        • R(b);OGATE,P_SPINR(b),XP(B)::QAB(A),XR(b)
        • R(b);OGATE::QAB(A)+P(B),XR(b)
      • Refutation
        • R(b);CHECK,XR(G)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);OGATE,P_PINR(G)::QAB1(A)
      • Refutation
        • R(b);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • R(b);N_GUARD,P_PINR(G)::QAB(A)+P(D)
      • R(b);N_GUARD::QAB(A)+P(D)
      • R(b);OGATE::P(D),XR(b)
      • R(b);OGATE::QAB(A)+P(D),XR(b)
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