MESON Chess Problem Database

Problem Display
PID: 188625 (8/8/ppP5/rb1kP3/pPRr1P2/P4R1B/3PQ3/B3NK2 w - - 0 1)

Thomson, Robert Gavin

To Alain White, 1945

8/8/ppP5/rb1kP3/pPRr1P2/P4R1B/3PQ3/B3NK2

#2

13 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd2
      • 2.Qe4#
    • 1...Rd3
      • 2.Qxd3#
      • 2.Qe4#
    • 1...Re4
      • 2.Qxe4#
    • 1...Bxc6
      • 2.Rxd4#
  • Tries
    • 1.Rd3?
      • threat
        • 2.Rdxd4#
      • 1...Rxd3
        • 2.Qxd3#
        • 2.Qe4#
      • 1...Bxc4
        • 2.Qf3#
        • 2.Qg2#
      • 1...Kxc4!
  • Keys
    • 1.Qg2!
      • 1...Bxc4+
        • 2.Rd3#
      • 1...Kxc4
        • 2.Rc3#
      • 1...Ke4
        • 2.Rf2#
      • 1...Rxd2
        • 2.Qg8#
      • 1...Rxc4
        • 2.Rd3#
      • 1...Rxf4
        • 2.Rxf4#
      • 1...Bxc6
        • 2.Rxd4#
      • 1...Rd3
        • 2.Qg8#
      • 1...Re4
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD,XP(D)::QAB1(E)
    • R(b);N_GUARD::QAB1(E),XR(b)
    • B(d);SBLOCK,XP(M)::R1(J),XR(b)
  • Tries
    • Try
      • R(G);P_PINR(b)
      • Threat
        • R1(G),XR(b)
      • Refutation
        • K(e);N_SPINR(b),S_FLIGHT,XR(J)
  • Actual
    • Q(E);P_SPINR(J)
    • Vars
      • B(d);CHECK,SBLOCK,XR(J)::QAB(E)+R(G)
      • K(e);S_FLIGHT,XR(J)::R1(G)
      • K(e);P_SPINR(b),S_FLIGHT::QAB(E)+R(G)
      • R(b);XP(D)::QAB(E)
      • R(b);SBLOCK,XR(J)::QAB(E)+R(G),DCHECK
      • R(b);N_PINR(J),OGATE,P_PINR(G),XP(K)::QAB(E)+R(G),XR(b)
      • B(d);N_PINR(J),SBLOCK,XP(M)::R1(J),XR(b)
      • R(b);N_PINR(J)::QAB(E)
      • R(b);::QAB(E)
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