MESON Chess Problem Database

Problem Display
PID: 77295 (2NKQ3/p4p2/Rn6/2pk1P2/br2rP2/N1n3R1/8/B3b2B w - - 0 1)

Holladay, Edgar Dinwiddie

The Problemist, 1976

2NKQ3/p4p2/Rn6/2pk1P2/br2rP2/N1n3R1/8/B3b2B

#2

10 + 10

6232 Holladay Chess Problems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qxe4#
    • 1...Rb1
      • 2.Rd3#
    • 1...Rb2
      • 2.Rd3#
    • 1...Rb3
      • 2.Rd3#
    • 1...Rb5
      • 2.Rd3#
    • 1...Bc6
      • 2.Qe5#
    • 1...Sc4
      • 2.Rd3#
    • 1...Sd7
      • 2.Rd6#
    • 1...Sa8
      • 2.Rd6#
      • 2.Qe5#
    • 1...Sxc8
      • 2.Qe5#
  • Tries
    • 1.Rxb6?
      • threat
        • 2.Rd6#
        • 2.Qe5#
      • 1...Kd4
        • 2.Rd6#
        • 2.Qxe4#
      • 1...Rxb6
        • 2.Rd3#
      • 1...Bxe8
        • 2.Rd6#
      • 1...c4
        • 2.Qe5#
      • 1...Bc6
        • 2.Qe5#
      • 1...Sb5
        • 2.Se7#
        • 2.Qc6#
        • 2.Qxf7#
        • 2.Qe5#
      • 1...f6
        • 2.Rd6#
      • 1...axb6!
    • 1.Qd7+?
      • 1...Sxd7
        • 2.Rd6#
      • 1...Bxd7!
    • 1.Qxf7+?
      • 1...Kc6
        • 2.Rg6#
        • 2.Qd7#
      • 1...Kd4!
    • 1.Qe6+?
      • 1...Kd4
        • 2.Qxe4#
      • 1...fxe6!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qd6#
      • 1...Kd4
        • 2.Qxe4#
      • 1...Kc6
        • 2.Qd7#
      • 1...Sxc8
        • 2.Qe5#
      • 1...Sb5
        • 2.Qb7#
      • 1...Sc4
        • 2.Rd3#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • K(g);N_SPINR(e),P-FLIGHT,P_SPINS(b)::QAR1(J),XR(e)
    • R(d);N_GUARD::R(D)
    • B(c);SBLOCK::QAR1(J)
    • S(h);S_CUTR(d)::R(D)
    • S(h);OGATE::R1(G)
    • S(h);XS(H)::QAR1(J)
  • Tries
    • Try
      • R(G);XS(h)
      • Threat
        • DUALS(2)
      • Vars
        • R(d);N_GUARD,XR(G)::R(D)
        • B(c);XQ(J)::R1(G)
        • P(f);::QAR1(J)
        • B(c);::QAR1(J)
        • P(j);::R1(G)
      • Refutation
        • P(i);XR(G)
    • Try
      • Q(J);CHECK
      • Vars
        • S(h);OGATE,XQ(J)::R1(G)
      • Refutation
        • B(c);XQ(J)
    • Try
      • Q(J);CHECK,XP(j)
      • Refutation
        • K(g);N_SPINR(e),P-FLIGHT,P_SPINS(b)
    • Try
      • Q(J);CHECK
      • Vars
        • K(g);N_SPINR(e),P-FLIGHT,P_SPINS(b)::QAR1(J),XR(e)
      • Refutation
        • P(j);XQ(J)
  • Actual
    • Q(J);
    • Threat
      • QAR1(J)
    • Vars
      • K(g);N_SPINR(e),P-FLIGHT,P_SPINS(b)::QAR1(J),XR(e)
      • K(g);P_SPINS(h),S_FLIGHT::QAB1(J)
      • S(h);XS(H)::QAR1(J)
      • S(b);S_CUTB(c)::QAB(J)
      • S(h);S_CUTR(d)::R(D)
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