MESON Chess Problem Database

Problem Display
PID: 172270 (1Q6/1p6/N1b5/8/k7/p1K5/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Twoja sudba, 1996

1Q6/1p6/N1b5/8/k7/p1K5/8/8

#2

3 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...bxa6
      • 2.Qb4#
  • Tries
    • 1.Sc7?
      • threat
        • 2.Qa7#
        • 2.Qa8#
      • 1...Ka5
        • 2.Qa7#
      • 1...b5
        • 2.Qa7#
      • 1...b6
        • 2.Qa7#
      • 1...Bb5!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Sc7#
      • 1...Ka5
        • 2.Sc7#
      • 1...Kb5
        • 2.Sc7#
      • 1...bxa6
        • 2.Qxa6#
      • 1...Bb5
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(d);OGATE,XS(B)::QAR1(C)
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR2(C)
        • P(d);::QAR(C)
      • Refutation
        • B(c);
  • Actual
    • Q(C);
    • Threat
      • QAR(C)+S(B)
    • Vars
      • K(b);P-FLIGHT::QAR(C)+S(B)
      • K(b);S_FLIGHT::S(B)
      • P(d);OGATE,P_SPINP(d),XS(B)::QAR2(C),XP(d)
      • B(c);SBLOCK::QAR(C)+S(B),DCHECK
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