MESON Chess Problem Database

Problem Display
PID: 146640 (8/1B6/8/5pQ1/3N1p2/K4p1N/1R4bk/4Rr1r w - - 0 1)

Betts, Frederick Charles

Good Companions (February), 1918

8/1B6/8/5pQ1/3N1p2/K4p1N/1R4bk/4Rr1r

#2

7 + 7

15 British Chess Magazine 1918
15351 SCPF/BCPS Black Books 2014

SOLUTION

  • SOUND
  • Sets
    • 1...f2
      • 2.Qxg2#
  • Tries
    • 1.Sxf4?
      • 1...Kg1
        • 2.Sxf3#
      • 1...Rxe1
        • 2.Sxf3#
      • 1...Rfg1
        • 2.Sxf3#
        • 2.Qh4#
      • 1...Rhg1
        • 2.Qh4#
      • 1...f2
        • 2.Qxg2#
      • 1...Rf2!
    • 1.Sxf3+?
      • 1...Kxh3
        • 2.Qh4#
        • 2.Qxg2#
      • 1...Rxf3+!
    • 1.Rxg2+?
      • 1...fxg2
        • 2.Qxg2#
      • 1...Kxh3!
  • Keys
    • 1.Sg1!
      • 1...Kxg1
        • 2.Sxf3#
      • 1...Rxe1
        • 2.Sdxf3#
      • 1...Rfxg1
        • 2.Qh4#
      • 1...Rhxg1
        • 2.Qh4#
      • 1...Rf2
        • 2.Qxf4#
      • 1...f2
        • 2.Qxg2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(e);N_GUARD,N_SPINB(c)::QAR1(F),XB(c)
  • Tries
    • Try
      • S(D);XP(f)
      • Vars
        • K(d);P_SPINR(a),S_FLIGHT::S(E),XP(e)
        • R(a);N_GUARD,XR(A)::S(E),XP(e)
        • R(b);SBLOCK::QAR2(F)
        • P(e);N_GUARD,N_SPINB(c)::QAR1(F),XB(c)
      • Refutation
        • R(a);N_SPINB(c)
    • Try
      • S(E);CHECK,XP(e)
      • Refutation
        • R(a);CHECK,XS(E)
    • Try
      • R(B);CHECK,XB(c)
      • Vars
        • P(e);OGATE,XR(B)::QAR1(F),XP(e)
      • Refutation
        • K(d);P-FLIGHT,XS(D)
  • Actual
    • S(D);
    • Vars
      • K(d);P_SPINR(a),S_FLIGHT,XS(D)::S(E),XP(e)
      • R(a);N_GUARD,XR(A)::S(E),XP(e)
      • R(a);XS(D)::QAR2(F)
      • R(b);SBLOCK,XS(D)::QAR2(F)
      • R(a);N_SPINB(c)::QAB(F),XP(f)
      • P(e);N_GUARD,N_SPINB(c)::QAR1(F),XB(c)
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