MESON Chess Problem Database

Problem Display
PID: 69192 (8/4p3/2PpP2p/4NRpK/3Pk2P/1B5R/1brn1Q2/2B5 w - - 0 1)

Pierce, William Timbrell

The Chess Player's Chronicle (Sampson), 1874

8/4p3/2PpP2p/4NRpK/3Pk2P/1B5R/1brn1Q2/2B5

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...gxh4
      • 2.Rxh4#
      • 2.Rf4#
      • 2.Qf4#
    • 1...g4
      • 2.Rf4#
      • 2.Qf4#
    • 1...dxe5
      • 2.Rxe5#
    • 1...d5
      • 2.Bxc2#
  • Tries
    • 1.Qe1+?
      • 1...Kxd4
        • 2.Qe3#
      • 1...Kxf5!
    • 1.Qe2+?
      • 1...Kxd4
        • 2.Qe3#
      • 1...Kxf5!
    • 1.Qg2+?
      • 1...Kxd4
        • 2.Qd5#
      • 1...Sf3
        • 2.Qg4#
      • 1...Kxf5!
    • 1.Qf3+?
      • 1...Kxd4
        • 2.Qd5#
        • 2.Qe3#
      • 1...Sxf3!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Bxc2#
      • 1...Kd3
        • 2.Sxd2#
      • 1...Kxf5
        • 2.Sxd2#
      • 1...Rxc1
        • 2.Sxd2#
      • 1...Rxc6
        • 2.Sxd2#
      • 1...Sxb3
        • 2.Qxc2#
      • 1...Rc3
        • 2.Sxd2#
      • 1...Rc4
        • 2.Sxd2#
      • 1...Rc5
        • 2.Sxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 2
  • Sets
    • P(f);OGATE,XS(G)::R1(H),XP(f)
    • P(f);SBLOCK::B(C),XR(b)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);P-FLIGHT,XP(E)::QAB1(B)
      • Refutation
        • K(d);S_FLIGHT,XR(H)
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);P-FLIGHT,XP(E)::QAB1(B)
      • Refutation
        • K(d);S_FLIGHT,XR(H)
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);OGATE,P-FLIGHT,XP(E)::QAR1(B)
        • S(c);P_SPINS(c)::QAR2(B)
      • Refutation
        • K(d);S_FLIGHT,XR(H)
    • Try
      • Q(B);CHECK
      • Refutation
        • S(c);XQ(B)
  • Actual
    • S(G);
    • Threat
      • B(C),XR(b)
    • Vars
      • K(d);S_FLIGHT::R(D)+S(G),XS(c)
      • K(d);S_FLIGHT,XR(H)::QAR(B)+S(G),XS(c)
      • R(b);N_GUARD,XB(A)::S(G),XS(c)
      • R(b);N_GUARD,XP(J)::S(G),XS(c)
      • S(c);OGATE,XB(C)::QAB(B),XR(b)
      • R(b);N_GUARD::S(G),XS(c)
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