MESON Chess Problem Database

Problem Display
PID: 161189 (3R4/4p2q/1p2pp1p/1n2kp2/1rQ1N2K/N4R1B/1b4b1/B7 w - - 0 1)

Stewart, John

Stubbs, Arthur Goodwin

Sunday Chronicle, 1944

(First published on Sun Jan 23 1944)

3R4/4p2q/1p2pp1p/1n2kp2/1rQ1N2K/N4R1B/1b4b1/B7

#2

8 + 12

14867 BCPS Library 2017
15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...fxe4
      • 2.Qxe6#
    • 1...f4
      • 2.Qxe6#
  • Tries
    • 1.Qxb5+?
      • 1...Kxe4
        • 2.Qe2#
      • 1...Rxb5!
    • 1.Qc5+?
      • 1...Kxe4
        • 2.Qe3#
      • 1...bxc5!
  • Keys
    • 1.Sf2!
      • threat
        • 2.Sd3#
      • 1...Rxc4+
        • 2.Sxc4#
      • 1...Rb3
        • 2.Qf4#
      • 1...Bd4
        • 2.Qe2#
      • 1...Bf1
        • 2.Re3#
      • 1...Sd4
        • 2.Qc7#
      • 1...f4
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • P(f);SBLOCK,XS(F)::QAR1(E),XP(h)
    • P(f);::QAR1(E),XP(h)
  • Tries
    • Try
      • Q(E);CHECK,P_SPINS(F),XS(d)
      • Vars
        • K(e);N_SPINB(a),OGATEB,P-FLIGHT,XS(F)::QAR2(E)
      • Refutation
        • R(c);N_PINS(F),XQ(E)
    • Try
      • Q(E);CHECK,P_SPINS(F)
      • Vars
        • K(e);N_SPINB(a),OGATEB,P-FLIGHT,XS(F)::QAR1(E)
      • Refutation
        • P(g);XQ(E)
  • Actual
    • S(F);P_SPINQ(E)
    • Threat
      • S(F)
    • Vars
      • R(c);CHECK,XQ(E)::S(B),XR(c)
      • R(c);N_GUARD,N_PINQ(E)::QAB1(E)
      • B(a);N_PINQ(E)::QAR(E)
      • B(b);N_GUARD::R(C)
      • S(d);N_PINQ(E),N_SPINB(a)::QAB(E)
      • P(f);N_PINQ(E)::QAR1(E),XP(h)
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