MESON Chess Problem Database

Problem Display
PID: 9721 (2r2B2/2n5/rp6/bR3p2/b1k5/2Pp4/1Q6/2R2K2 w - - 0 1)

Elkhan, Alexander A

Western Daily Mercury, 1908

2r2B2/2n5/rp6/bR3p2/b1k5/2Pp4/1Q6/2R2K2

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bb3
      • 2.Qxb3#
    • 1...Bxb5
      • 2.Qa2#
    • 1...Bxc3
      • 2.Qb4#
    • 1...Bb4
      • 2.Qxb4#
  • Tries
    • 1.Qa2+?
      • 1...Bb3
        • 2.Qxb3#
      • 1...Kxb5!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qc6#
      • 1...Kxb5
        • 2.c4#
      • 1...Bxb5
        • 2.Qa2#
      • 1...Bxc3
        • 2.Rb4#
      • 1...Sxb5
        • 2.Qg8#
      • 1...Bb4
        • 2.Rxb4#
      • 1...d2
        • 2.Qe2#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Se6
        • 2.Qd5#
      • 1...Sa8
        • 2.Qd5#
      • 1...Se8
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • B(b);N_GUARD::QAB1(C),XB(b)
    • B(b);N_GUARD,SBLOCK,XR(E)::QAB(C)
    • B(d);N_GUARD,P_SPINB(d),XP(D)::QAR1(C)
    • B(d);N_GUARD::QAR1(C),XB(d)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAB1(C),XB(b)
      • Refutation
        • K(c);S_FLIGHT,XR(E)
  • Actual
    • Q(C);
    • Threat
      • QAR2(C)
    • Vars
      • K(c);OGATE,S_FLIGHT,XR(E)::P(D)
      • B(b);N_GUARD,SBLOCK,XR(E)::QAB(C)
      • B(d);N_GUARD,P_SPINB(d),XP(D)::R1(E)
      • S(h);N_GUARD,SBLOCK,XR(E)::QAB(C)
      • B(d);N_GUARD::R1(E),XB(d)
      • P(a);OGATEB::QAB(C)
      • S(h);N_GUARD::QAB1(C),XS(h)
      • S(h);N_GUARD::QAB1(C)
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