MESON Chess Problem Database

Problem Display
PID: 271242 (b3B3/2b4K/7P/1p1p1p1N/4k3/5N1r/Q1prP3/4R1B1 w - - 0 1)

Tibbs, WJ

Sunday Referee, 1932

(First published on Sun Nov 13 1932)

b3B3/2b4K/7P/1p1p1p1N/4k3/5N1r/Q1prP3/4R1B1

#2

9 + 9

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4
      • 2.Sf6#
    • 1...Be5
      • 2.Sxd2#
      • 2.Sg5#
    • 1...d4
      • 2.Qxa8#
    • 1...f4
      • 2.Bg6#
  • Tries
    • 1.Qxc2+?
      • 1...Rd3
        • 2.Qxd3#
      • 1...Rxc2!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Qe3#
      • 1...Rxe2
        • 2.Rxe2#
      • 1...Rxf3
        • 2.exf3#
      • 1...d4
        • 2.Qxa8#
      • 1...f4
        • 2.Bg6#
      • 1...Rd3
        • 2.Qxd3#
      • 1...Bf4
        • 2.Sf6#
      • 1...Bb6
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(h);SBLOCK::S(F)
    • P(f);OGATEB::QAB(C),XB(i)
    • P(g);OGATEB::B(I)
  • Tries
    • Try
      • Q(C);CHECK,XP(a)
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(C),XR(b)
      • Refutation
        • R(b);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • R(b);OGATE,P_SPINR(b),XP(D)::R(A),XR(b)
      • R(c);OGATE,XS(E)::R(A)+P(D)DCHECK,XR(c)
      • P(f);OGATEB::QAB(C),XB(i)
      • P(g);OGATEB::B(I)
      • R(b);N_GUARD::QAB1(C),XR(b)
      • B(h);SBLOCK::S(F)
      • B(h);N_GUARD::QAR(C)
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