MESON Chess Problem Database

Problem Display
PID: 226923 (8/4N3/1KQ1p3/4p3/2Pk4/3p1r2/3P4/8 w - - 0 1)

Elkhan, Alexander A

Tidskrift for Schack, 1910

8/4N3/1KQ1p3/4p3/2Pk4/3p1r2/3P4/8

#2

5 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...e4
      • 2.Qc5#
  • Tries
    • 1.Sf5+?
      • 1...exf5
        • 2.Qd5#
      • 1...Rxf5!
    • 1.Qd7+?
      • 1...Kxc4
        • 2.Qa4#
      • 1...Ke4!
    • 1.c5?
      • threat
        • 2.Qa4#
      • 1...Kc4
        • 2.Qa4#
      • 1...e4!
  • Keys
    • 1.Qa4!
      • threat
        • 2.c5#
      • 1...Ke4
        • 2.c5#
      • 1...e4
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(d);SBLOCK::QAB1(D)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • P(e);XS(E)::QAR1(D)
      • Refutation
        • R(b);XS(E)
    • Try
      • Q(D);CHECK
      • Vars
        • K(c);OGATEB,P-FLIGHT,XP(B)::QAR2(D)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • P(B);
      • Threat
        • QAR(D)
      • Vars
        • K(c);P-FLIGHT::QAR2(D)
      • Refutation
        • P(d);
  • Actual
    • Q(D);
    • Threat
      • QAR(D)+P(B)
    • Vars
      • K(c);P-FLIGHT::QAR(D)+P(B)
      • P(d);SBLOCK::S(E)
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