MESON Chess Problem Database

Problem Display
PID: 76424 (5q2/p2P4/1pp1PB2/Q1Pk1P1N/3Np2r/1PpRR2p/2KnP1B1/8 w - - 0 1)

Holladay, Edgar Dinwiddie

HM., 03. Hochberg MT, 1944

5q2/p2P4/1pp1PB2/Q1Pk1P1N/3Np2r/1PpRR2p/2KnP1B1/8

#2

14 + 10

6232 Holladay Chess Problems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc5
      • 2.d8Q#
      • 2.d8R#
    • 1...Qh6
      • 2.d8Q#
      • 2.d8R#
    • 1...Rf4
      • 2.Sxf4#
    • 1...bxc5
      • 2.Sb5#
  • Tries
    • 1.Bxe4+?
      • 1...Sxe4
        • 2.Sf3#
      • 1...Rxe4!
    • 1.cxb6+?
      • 1...Kd6
        • 2.Qe5#
      • 1...Qc5
        • 2.d8Q#
        • 2.d8R#
      • 1...c5!
    • 1.d8Q+?
      • 1...Qd6
        • 2.Qxd6#
      • 1...Qxd8!
    • 1.d8R+?
      • 1...Qd6
        • 2.Rxd6#
      • 1...Qxd8!
  • Keys
    • 1.Rxe4!
      • threat
        • 2.Re5#
      • 1...Qxc5
        • 2.d8Q#
        • 2.d8R#
      • 1...Qxf6
        • 2.Sxf6#
      • 1...Rxe4
        • 2.Sf4#
      • 1...Sxb3
        • 2.Sxb3#
      • 1...Sxe4
        • 2.Sf3#
      • 1...bxc5
        • 2.Sb5#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(j);N_GUARD,P_SPINQ(j),XP(I)::P=Q
    • Q(j);N_GUARD::P=Q
    • R(e);N_GUARD::S(K),XR(e)
    • P(g);SBLOCK,XP(I)::R(E)+S(G)
  • Tries
    • Try
      • B(C);CHECK,XP(d)
      • Vars
        • S(a);XB(C)::R(E)+S(G)
      • Refutation
        • R(e);XB(C)
    • Try
      • P(I);CHECK,XP(g)
      • Vars
        • K(f);N_SPINP(d),OGATE,P-FLIGHT::QAB1(H)
        • Q(j);P_SPINQ(j)::P=Q
      • Refutation
        • P(h);
    • Try
      • P(N);CHECK
      • Vars
        • Q(j);N_GUARD,P_SPINQ(j)::QAR1(N),XQ(j)
      • Refutation
        • Q(j);XQ(N)
    • Try
      • P(N);CHECK
      • Vars
        • Q(j);N_GUARD,P_SPINQ(j)::R1(N),XQ(j)
      • Refutation
        • Q(j);XR(N)
  • Actual
    • R(F);XP(d)
    • Threat
      • B(C)+R(F),DCHECK
    • Vars
      • Q(j);N_GUARD,P_SPINQ(j),XP(I)::P=Q
      • Q(j);XB(M)::S(K),XQ(j)
      • R(e);N_GUARD,P_SPINR(e),XR(F)::S(K)
      • S(a);XP(D)::R(E)+S(G),XS(a)
      • S(a);P_SPINS(a),SBLOCK,XR(F)::R(E)+S(G)
      • P(g);P_SPINP(g),SBLOCK,XP(I)::R(E)+S(G)
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