MESON Chess Problem Database

Problem Display
PID: 143018 (8/8/2Bp4/2NrR3/2Nk1nP1/K7/2PP2P1/7Q w - - 0 1)

Thorns, JS

British Chess Magazine, 1892

8/8/2Bp4/2NrR3/2Nk1nP1/K7/2PP2P1/7Q

#2

10 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5
      • 2.Re4#
  • Tries
    • 1.Sb6?
      • 1...Kxe5
        • 2.Qh8#
      • 1...Rxc5
        • 2.Re4#
      • 1...Rxe5
        • 2.Sb3#
      • 1...Sxg2
        • 2.Rxd5#
      • 1...dxc5
        • 2.Qa1#
      • 1...dxe5
        • 2.Qg1#
      • 1...Se2
        • 2.Rxd5#
      • 1...Sd3
        • 2.Rxd5#
      • 1...Sh3
        • 2.Rxd5#
      • 1...Sh5
        • 2.Rxd5#
      • 1...Se6
        • 2.Rxd5#
      • 1...Sg6
        • 2.Rxd5#
      • 1...Kxc5!
    • 1.Qa1+?
      • 1...Kxc4
        • 2.Qc3#
      • 1...Kxc5!
  • Keys
    • 1.Sa5!
      • 1...Kxc5
        • 2.Qg1#
      • 1...Kxe5
        • 2.Qh8#
      • 1...Rxc5
        • 2.Re4#
      • 1...Rxe5
        • 2.Scb3#
      • 1...Sxg2
        • 2.Rxd5#
      • 1...dxc5
        • 2.Qa1#
      • 1...dxe5
        • 2.Qg1#
      • 1...Se2
        • 2.Rxd5#
      • 1...Sd3
        • 2.Rxd5#
      • 1...Sh3
        • 2.Rxd5#
      • 1...Sh5
        • 2.Rxd5#
      • 1...Se6
        • 2.Rxd5#
      • 1...Sg6
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK,XS(H)::R1(I)
  • Tries
    • Try
      • S(F);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(I)::QAB(A)
        • R(c);SBLOCK,XS(H)::R1(I)
        • R(c);SBLOCK,XR(I)::S(H)
        • S(b);N_GUARD,XP(D)::R1(I),XR(c)
        • P(d);SBLOCK,XS(H)::QAB(A)
        • P(d);SBLOCK,XR(I)::QAB(A)
        • S(b);N_GUARD::R1(I),XR(c)
      • Refutation
        • K(a);P_SPINR(c),S_FLIGHT,XS(H)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT,XS(F)::QAR1(A)
      • Refutation
        • K(a);P_SPINR(c),S_FLIGHT,XS(H)
  • Actual
    • S(F);
    • Vars
      • K(a);P_SPINR(c),S_FLIGHT,XS(H)::QAB(A)
      • K(a);OGATEB,S_FLIGHT,XR(I)::QAB(A)
      • R(c);SBLOCK,XS(H)::R1(I)
      • R(c);SBLOCK,XR(I)::S(H)
      • S(b);N_GUARD,XP(D)::R1(I),XR(c)
      • P(d);SBLOCK,XS(H)::QAB(A)
      • P(d);SBLOCK,XR(I)::QAB(A)
      • S(b);N_GUARD::R1(I),XR(c)
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