MESON Chess Problem Database

Problem Display
PID: 172343 (8/8/8/3p4/4p3/1KNk2p1/8/4Q3 w - - 0 1)

Andreev, Aleksandr Grigorevich

Vecherni Krasnodar, 1996

8/8/8/3p4/4p3/1KNk2p1/8/4Q3

#2

3 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.Qd1#
    • 1...d4
      • 2.Qe2#
  • Tries
    • 1.Sb1?
      • threat
        • 2.Qd2#
      • 1...Kd4
        • 2.Qc3#
      • 1...e3!
    • 1.Sxd5?
      • threat
        • 2.Qd1#
        • 2.Qe3#
      • 1...e3
        • 2.Qxe3#
      • 1...Kd4!
  • Keys
    • 1.Sd1!
      • threat
        • 2.Qe3#
      • 1...Kd4
        • 2.Qc3#
      • 1...e3
        • 2.Qxe3#
      • 1...d4
        • 2.Sb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAR2(A)
    • P(d);SBLOCK::QAB1(A)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • S(C);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAR1(A),XP(c)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(C);
    • Threat
      • QAR1(A)
    • Vars
      • K(a);P-FLIGHT::QAB1(A)
      • P(c);::QAR1(A),XP(c)
      • P(d);SBLOCK::S(C)
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