MESON Chess Problem Database

Problem Display
PID: 158420 (6K1/6p1/4n2k/6p1/8/2Q3N1/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1996

6K1/6p1/4n2k/6p1/8/2Q3N1/8/8

#2

3 + 4

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Qxg7#
    • 1...Sc5
      • 2.Qxg7#
    • 1...Sc7
      • 2.Qxg7#
    • 1...Sd8
      • 2.Qxg7#
    • 1...Sf8
      • 2.Qxg7#
    • 1...g6
      • 2.Qh8#
  • Tries
    • 1.Qf6+?
      • 1...g6
        • 2.Qh8#
      • 1...gxf6!
    • 1.Qc6?
      • 1...Kg6
        • 2.Qxe6#
      • 1...g6
        • 2.Qh1#
      • 1...g4!
  • Keys
    • 1.Qe5!
      • 1...Kg6
        • 2.Qxe6#
      • 1...Sd4
        • 2.Qxg7#
      • 1...Sf4
        • 2.Qxg7#
      • 1...Sc5
        • 2.Qxg7#
      • 1...Sc7
        • 2.Qxg7#
      • 1...Sd8
        • 2.Qxg7#
      • 1...Sf8
        • 2.Qxg7#
      • 1...g4
        • 2.Qh5#
      • 1...g6
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAB1(A),XP(d)
    • P(d);OGATE,SBLOCK::QAR2(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • P(d);OGATE,P_SPINP(d),SBLOCK::QAR2(A)
      • Refutation
        • P(d);XQ(A)
    • Try
      • Q(A);P_PINS(b)
      • Vars
        • K(c);P-FLIGHT::QAR2(A),XS(b)
        • P(d);N_SPINS(b),SBLOCK::QAR(A)
      • Refutation
        • P(a);
  • Actual
    • Q(A);
    • Vars
      • K(c);P-FLIGHT::QAR2(A),XS(b)
      • S(b);N_GUARD::QAB1(A),XP(d)
      • P(a);OGATE::QAR1(A)
      • P(d);OGATE,SBLOCK::QAR2(A)
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