MESON Chess Problem Database

Problem Display
PID: 81669 (2b3B1/B6r/p6p/2NN1p2/2pkPP2/rQ1p3K/n7/3R4 w - - 0 1)

Stewart, John

Stubbs, Arthur Goodwin

The Field, 1952

(First published on Sat Jul 19 1952)

2b3B1/B6r/p6p/2NN1p2/2pkPP2/rQ1p3K/n7/3R4

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...d2
      • 2.Rxd2#
    • 1...c3
      • 2.Rxd3#
    • 1...fxe4+
      • 2.Sd7#
  • Tries
    • 1.Sxd3+?
      • 1...Kxe4
        • 2.Sf2#
        • 2.Sc5#
      • 1...Rxa7!
    • 1.Qb2+?
      • 1...Rc3
        • 2.Qf2#
      • 1...Sc3
        • 2.Qf2#
      • 1...c3!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qf2#
      • 1...d2+
        • 2.Sb3#
      • 1...fxe4+
        • 2.Sd7#
      • 1...c3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB,P_PINQ(B)::R(A),XP(c)
    • P(d);N_GUARD::R1(A),XP(c)
    • P(f);CHECK,SBLOCK,XP(D)::B(H)+S(F)
  • Tries
    • Try
      • S(F);CHECK,XP(c)
      • Refutation
        • R(i);XB(H)
    • Try
      • Q(B);CHECK
      • Vars
        • R(b);P_SPINR(b)::QAB(B)
        • S(a);P_SPINS(a)::QAB(B)
      • Refutation
        • P(d);N_SPINP(c),P_SPINP(d)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • P(c);CHECK::B(H)+S(F),DCHECK
      • P(f);CHECK,SBLOCK,XP(D)::B(H)+S(F)
      • P(d);N_GUARD,S_CUTR(b)::QAR1(B),XP(c)
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