MESON Chess Problem Database

Problem Display
PID: 16340 (8/8/8/4p3/1P2r1pb/KP1kP3/N1p1RpQ1/n1R2B2 w - - 0 1)

Gunn, Robert Ivan

Chess, 1940

8/8/8/4p3/1P2r1pb/KP1kP3/N1p1RpQ1/n1R2B2

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe3
      • 2.Qd5#
  • Tries
    • 1.Rcxc2?
      • threat
        • 2.Sc1#
        • 2.Rcd2#
        • 2.Rc3#
      • 1...Rxe3
        • 2.Rcd2#
        • 2.Red2#
        • 2.Qd5#
      • 1...Sxb3
        • 2.Rc3#
      • 1...Rc4
        • 2.Sc1#
        • 2.Rcd2#
      • 1...Sxc2+!
    • 1.Qf3?
      • threat
        • 2.Rexc2#
        • 2.Rxf2#
      • 1...Rxe3
        • 2.Qd5#
        • 2.Qxe3#
      • 1...gxf3!
  • Keys
    • 1.Rce1!
      • threat
        • 2.Rxf2#
      • 1...c1Q+
        • 2.Rb2#
      • 1...c1B+
        • 2.Rb2#
      • 1...Rxe3
        • 2.Qd5#
      • 1...fxe1Q
        • 2.Rxe1#
      • 1...fxe1S
        • 2.Rxe1#
      • 1...fxe1B
        • 2.Rxe1#
      • 1...fxe1R
        • 2.Rxe1#
      • 1...c1S
        • 2.Rd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(e);OGATE,XP(H)::QAR2(E)
  • Tries
    • Try
      • R(A);XP(b)
      • Threat
        • DUALS(3)
      • Vars
        • S(a);XP(G)::R1(A)
      • Refutation
        • S(a);CHECK,XR(A)
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Refutation
        • P(f);XQ(E)
  • Actual
    • R(A);
    • Threat
      • B(B)+R(D),XP(c)
    • Vars
      • P(b);CHECK,OGATE::B(B)+R(D)
      • R(e);OGATE,XP(H)::QAR2(E)
      • P(c);OGATE,XR(A)::B(B)+R(D),XQ(c)
      • P(c);OGATE,XR(A)::B(B)+R(D),XS(c)
      • P(c);OGATE,XR(A)::B(B)+R(D),XB(c)
      • P(c);OGATE,XR(A)::B(B)+R(D),XR(c)
      • P(b);N_GUARD::R(A)
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