MESON Chess Problem Database

Problem Display
PID: 153479 (8/1Rr1r1p1/1RB1k1P1/1pQN2p1/3n2P1/1pB1ppK1/3qpP2/8 w - - 0 1)

Betts, Frederick Charles

Source?, 0000

8/1Rr1r1p1/1RB1k1P1/1pQN2p1/3n2P1/1pB1ppK1/3qpP2/8

#2

10 + 12

15351 SCPF/BCPS Black Books 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc6
      • 2.Rxe7#
    • 1...Rc8
      • 2.Rxe7#
      • 2.Qxe7#
  • Tries
    • 1.Sf4+?
      • 1...Kf6
        • 2.Qf5#
      • 1...gxf4+!
    • 1.Sxc7+?
      • 1...Kf6
        • 2.Qf5#
      • 1...Rxc7!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Bd7#
      • 1...Sf5+
        • 2.gxf5#
      • 1...Kxf6
        • 2.Qf5#
      • 1...Rxc6
        • 2.Qxe7#
      • 1...Sxc6
        • 2.Qe5#
      • 1...gxf6
        • 2.Qd5#
      • 1...Rcd7
        • 2.Bxd7#
      • 1...Red7
        • 2.Bxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(j);OGATE,P_SPINR(j),XB(H)::R1(J),XR(k)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(i);P-FLIGHT,P_SPINS(f)::QAR1(E)
      • Refutation
        • P(h);CHECK,XS(F)
    • Try
      • S(F);CHECK,XR(j)
      • Vars
        • K(i);P-FLIGHT,P_SPINS(f)::QAR1(E)
      • Refutation
        • R(k);XS(F)
  • Actual
    • S(F);
    • Threat
      • R(G)+B(H),DCHECK
    • Vars
      • S(f);CHECK,OGATE::P(D),XS(f)
      • K(i);P-FLIGHT,P_SPINS(f),XS(F)::QAR1(E)
      • R(j);N_GUARD,P_SPINR(j),XB(H)::QAR1(E),XR(k)
      • S(f);P_SPINS(f),XB(H)::QAR1(E)
      • P(l);SBLOCK,XS(F)::QAB1(E)
      • R(j);::R(G)+B(H),DCHECK,XR(j)
      • R(k);::R(G)+B(H),DCHECK,XR(k)
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