MESON Chess Problem Database

Problem Display
PID: 169857 (5Q2/8/8/2b5/8/3p1N2/3R2n1/5k1K w - - 0 1)

Akkerman, O

Shakhmaty v SSSR, 1945

5Q2/8/8/2b5/8/3p1N2/3R2n1/5k1K

#2

4 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Sh2#
  • Tries
    • 1.Qf5?
      • threat
        • 2.Qxd3#
      • 1...Se1
        • 2.Sh2#
      • 1...Sf4!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qxg2#
      • 1...Se1
        • 2.Sh2#
      • 1...Se3
        • 2.Qg1#
      • 1...Sf4
        • 2.Qa1#
      • 1...Sh4
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(b);SBLOCK::QAR(D)+S(C),DCHECK
  • Tries
    • Try
      • Q(D);
      • Threat
        • QAB(D),XP(c)
      • Vars
        • S(b);SBLOCK::QAR(D)+S(C),DCHECK
      • Refutation
        • S(b);
  • Actual
    • Q(D);
    • Threat
      • QAB1(D),XS(b)
    • Vars
      • S(b);SBLOCK::S(C)
      • S(b);OGATE::QAR1(D)
      • S(b);N_GUARD::QAR(D)
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