MESON Chess Problem Database

Problem Display
PID: 17490 (4N1K1/1p5p/1BpPk1p1/3bN3/2B2pP1/8/1Q6/3RR3 w - - 0 1)

McWilliam, Robert C

Chess, 1947

4N1K1/1p5p/1BpPk1p1/3bN3/2B2pP1/8/1Q6/3RR3

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Bxd5#
  • Tries
    • 1.Sc7+?
      • 1...Kf6+
        • 2.Sf7#
      • 1...Kxd6+!
    • 1.Sg7+?
      • 1...Kf6+
        • 2.Sf7#
      • 1...Kxd6+!
    • 1.Rxd5?
      • threat
        • 2.Rdd1#
        • 2.Rd2#
        • 2.Rd3#
        • 2.Rd4#
        • 2.Ra5#
        • 2.Rb5#
        • 2.Rc5#
      • 1...c5
        • 2.Rdd1#
        • 2.Rd2#
        • 2.Rd3#
        • 2.Rd4#
        • 2.Rxc5#
      • 1...cxd5!
    • 1.Qc2?
      • 1...Bxc4
        • 2.Qxc4#
      • 1...c5
        • 2.Bxd5#
      • 1...g5
        • 2.Qf5#
      • 1...h5
        • 2.Qxg6#
      • 1...h6
        • 2.Qxg6#
      • 1...f3!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Sf7#
      • 1...Kxd6+
        • 2.Sf7#
      • 1...Kxf6+
        • 2.Sf7#
      • 1...Bxc4
        • 2.Sxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(c);N_GUARD::B(D),XB(b)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(d);CHECK,N_SPINB(b),P-FLIGHT::QAB(C)+S(F)
      • Refutation
        • K(d);CHECK,P-FLIGHT,XP(H)
    • Try
      • S(I);CHECK
      • Vars
        • K(d);CHECK,N_SPINB(b),P-FLIGHT::QAB(C)+S(F)
      • Refutation
        • K(d);CHECK,P-FLIGHT,XP(H)
    • Try
      • R(A);XB(b)
      • Threat
        • DUALS(7)
      • Refutation
        • P(c);P_SPINP(c),XR(A)
    • Try
      • Q(C);
      • Vars
        • B(b);N_SPINB(b),OGATE,XB(D)::QAB(C),XB(b)
        • P(c);N_GUARD::B(D),XB(b)
        • P(e);N_GUARD::QAB1(C)
        • P(g);N_GUARD::QAR2(C),XP(e)
      • Refutation
        • P(a);
  • Actual
    • S(I);
    • Threat
      • R(B)+S(F)
    • Vars
      • K(d);CHECK,P-FLIGHT,XP(H)::S(F)
      • K(d);CHECK,N_SPINB(b),P-FLIGHT,XS(I)::QAB(C)+S(F)
      • B(b);N_SPINB(b),XB(D)::R(B)+S(F),XB(b)
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