MESON Chess Problem Database

Problem Display
PID: 172285 (8/8/8/8/3Q4/2K2p2/2N1k3/5n2 w - - 0 1)

Andreev, Aleksandr Grigorevich

Vecherni Krasnodar, 1996

8/8/8/8/3Q4/2K2p2/2N1k3/5n2

#2

3 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...f2
      • 2.Qd3#
      • 2.Qg4#
  • Tries
    • 1.Qf2+?
      • 1...Kd1
        • 2.Qe1#
        • 2.Qxf1#
      • 1...Kxf2!
    • 1.Qe3+?
      • 1...Kd1
        • 2.Qe1#
      • 1...Sxe3!
    • 1.Qc4+?
      • 1...Kd1
        • 2.Qxf1#
      • 1...Kf2!
    • 1.Qh4?
      • threat
        • 2.Qe1#
      • 1...Kd1
        • 2.Qe1#
      • 1...f2
        • 2.Qg4#
        • 2.Qh5#
      • 1...Sg3!
  • Keys
    • 1.Qg1!
      • 1...Kd1
        • 2.Qxf1#
      • 1...f2
        • 2.Qg4#
      • 1...Sd2
        • 2.Sd4#
        • 2.Qe1#
      • 1...Sh2
        • 2.Sd4#
        • 2.Qe1#
      • 1...Se3
        • 2.Sd4#
        • 2.Qe1#
      • 1...Sg3
        • 2.Sd4#
        • 2.Qe1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);CHECK
      • Refutation
        • K(b);P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(C)
      • Refutation
        • S(a);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR2(C),XS(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(b);S_FLIGHT::QAR1(C)
      • Refutation
        • S(a);
  • Actual
    • Q(C);
    • Vars
      • K(b);P_SPINS(a),S_FLIGHT::QAR2(C),XS(a)
      • P(c);OGATEB,SBLOCK::QAB(C)
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