MESON Chess Problem Database

Problem Display
PID: 221708 (2R3B1/3ppr2/Q4pNn/2pk1q1R/6p1/1PP3K1/5N2/8 w - - 0 1)

Langstaff, William A

British Chess Magazine, 1928

2R3B1/3ppr2/Q4pNn/2pk1q1R/6p1/1PP3K1/5N2/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5+
      • 2.Sf4#
    • 1...c4
      • 2.bxc4#
    • 1...d6
      • 2.Qc4#
    • 1...e5
      • 2.Se7#
    • 1...e6
      • 2.Qd3#
  • Tries
    • 1.Bxf7+?
      • 1...e6
        • 2.Qd3#
      • 1...Sxf7!
    • 1.Rxf5+?
      • 1...e5
        • 2.Sf4#
        • 2.Se7#
      • 1...Sxf5+!
    • 1.Qb6?
      • threat
        • 2.Rxc5#
      • 1...Qe5+
        • 2.Sf4#
      • 1...c4
        • 2.Rc5#
        • 2.bxc4#
      • 1...d6!
  • Keys
    • 1.Rc7!
      • threat
        • 2.Rxd7#
      • 1...Qe5+
        • 2.Sf4#
      • 1...d6
        • 2.Qc4#
      • 1...c4
        • 2.bxc4#
      • 1...e5
        • 2.Se7#
      • 1...e6
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(d);CHECK::S(G)
    • P(b);OGATE::P(B),XP(b)
    • P(g);SBLOCK::QAB1(F)
    • P(h);N_SPINQ(d),SBLOCK::S(G)
    • P(h);N_SPINR(i),SBLOCK::QAR2(F)
  • Tries
    • Try
      • B(I);CHECK,XR(i)
      • Vars
        • P(h);P_SPINP(h)::QAR2(F)
      • Refutation
        • S(f);XB(I)
    • Try
      • R(E);CHECK,XQ(d)
      • Refutation
        • S(f);CHECK,XR(E)
    • Try
      • Q(F);
      • Threat
        • R1(H),XP(b)
      • Vars
        • Q(d);CHECK::S(G)
      • Refutation
        • P(g);
  • Actual
    • R(H);
    • Threat
      • R(H),XP(g)
    • Vars
      • Q(d);CHECK::S(G)
      • P(g);SBLOCK::QAB1(F)
      • P(b);OGATE::P(B),XP(b)
      • P(h);N_SPINQ(d),SBLOCK::S(G)
      • P(h);N_SPINR(i),SBLOCK::QAR2(F)
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