MESON Chess Problem Database

Problem Display
PID: 153470 (8/2ppp1B1/Rprk3K/6p1/P2NP3/1N2Q3/7b/2nR4 w - - 0 1)

Betts, Frederick Charles

British Chess Magazine, 1915

8/2ppp1B1/Rprk3K/6p1/P2NP3/1N2Q3/7b/2nR4

#2

9 + 9

15351 SCPF/BCPS Black Books 2014

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Bf8#
    • 1...e6
      • 2.Sf5#
  • Tries
    • 1.Sf3+?
      • 1...Ke6
        • 2.Sxg5#
      • 1...Sd3!
    • 1.Sxc6+?
      • 1...Kxc6
        • 2.Sa5#
      • 1...Ke6
        • 2.Sd8#
      • 1...Sd3!
    • 1.Qxg5?
      • threat
        • 2.Qd5#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Be5
        • 2.Bxe5#
        • 2.Qxe5#
      • 1...e5
        • 2.Bf8#
        • 2.Qf6#
      • 1...e6
        • 2.Sb5#
        • 2.Sf5#
        • 2.Bf8#
      • 1...Bf4!
    • 1.Qg3+?
      • 1...e5
        • 2.Bf8#
      • 1...Bxg3!
    • 1.e5+?
      • 1...Bxe5
        • 2.Qxe5#
      • 1...Kd5+!
  • Keys
    • 1.Sa5!
      • threat
        • 2.Sb7#
      • 1...Kc5+
        • 2.Sdxc6#
      • 1...bxa5
        • 2.Qa3#
      • 1...e5
        • 2.Bf8#
      • 1...e6
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(i);OGATEB,SBLOCK::B(I)
    • P(i);SBLOCK::R(A)+S(E),DCHECK
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(f);P-FLIGHT::S(E),XP(c)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • S(E);CHECK,XR(e)
      • Vars
        • K(f);P-FLIGHT,P_SPINP(d),XS(E)::S(B)
        • K(f);P-FLIGHT::S(E)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(C);XP(c)
      • Threat
        • QAR1(C)
      • Vars
        • R(e);N_GUARD,P_SPINP(d)::QAB1(C),XR(e)
      • Refutation
        • B(b);P_PINQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • P(i);P_SPINP(i),S_CUTB(b)::B(I)
      • Refutation
        • B(b);XQ(C)
    • Try
      • P(F);CHECK
      • Vars
        • B(b);OGATE,XP(F)::QAB1(C),XB(b)
      • Refutation
        • K(f);CHECK,P-FLIGHT
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • K(f);CHECK,S_FLIGHT::QAB(C)+S(E),XR(e)
      • P(d);P_SPINR(e),XS(B)::QAB(C)
      • P(i);OGATEB,SBLOCK::B(I)
      • P(i);SBLOCK::R(A)+S(E),DCHECK
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