MESON Chess Problem Database

Problem Display
PID: 132407 (3K2n1/2pp4/7P/2QNbkNp/P5pP/1p2RpP1/2R5/rB5b w - - 0 1)

Baxter, JL

The Field, 1957

(First published on Thu Jan 3 1957)

3K2n1/2pp4/7P/2QNbkNp/P5pP/1p2RpP1/2R5/rB5b

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Rxa2#
      • 2.Rb2#
    • 1...Ra3
      • 2.Rc1#
      • 2.Ra2#
      • 2.Rb2#
      • 2.Rd2#
      • 2.Rce2#
      • 2.Rf2#
      • 2.Rg2#
      • 2.Rh2#
      • 2.Rcc3#
      • 2.Rc4#
    • 1...Rxa4
      • 2.Rc4#
    • 1...Bf6+
      • 2.Se7#
    • 1...Sf6
      • 2.Se7#
    • 1...bxc2
      • 2.Bxc2#
      • 2.Qxc2#
    • 1...f2
      • 2.Rxf2#
  • Tries
    • 1.Se7+?
      • 1...Kf6
        • 2.Qxe5#
      • 1...Sxe7!
    • 1.Qf8+?
      • 1...Kg6
        • 2.Rc6#
      • 1...Sf6
        • 2.Se7#
      • 1...Bf6+!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qd3#
      • 1...Bf6+
        • 2.Se7#
      • 1...Kg6
        • 2.Rc6#
      • 1...Rxa4
        • 2.Rc4#
      • 1...Sf6
        • 2.Se7#
      • 1...f2
        • 2.Rxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD,XP(E)::B(A)+R(B)
    • B(f);CHECK,SBLOCK::QAR(G)+S(H),DCHECK
    • S(k);N_GUARD,SBLOCK::S(H)
    • P(d);::B(A)+R(B),DCHECK,XP(d)
  • Tries
    • Try
      • S(H);CHECK,P_PINB(f)
      • Vars
        • K(g);N_SPINB(f),P-FLIGHT::QAB1(G),XB(f)
      • Refutation
        • S(k);XS(H)
    • Try
      • Q(G);CHECK
      • Vars
        • K(g);S_FLIGHT::B(A)+R(B),DCHECK
        • S(k);P_SPINS(k)::S(H)
      • Refutation
        • B(f);CHECK,P_SPINB(f)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)
    • Vars
      • B(f);CHECK,SBLOCK::QAR(G)+S(H),DCHECK
      • K(g);S_FLIGHT::B(A)+R(B),DCHECK
      • R(a);N_GUARD,XP(E)::B(A)+R(B)
      • S(k);N_GUARD,SBLOCK::S(H)
      • P(d);::B(A)+R(B),DCHECK,XP(d)
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