MESON Chess Problem Database

Problem Display
PID: 171295 (8/8/2K5/2B5/2k5/2p5/2Q5/2n5 w - - 0 1)

Antipov, Viacheslav Pavlovich

Znamya Ilycha, 1987

8/8/2K5/2B5/2k5/2p5/2Q5/2n5

#2

3 + 3

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Qe2#
    • 1...Sd3
      • 2.Qa2#
  • Tries
    • 1.Qd1?
      • threat
        • 2.Qd5#
      • 1...c2
        • 2.Qxc2#
      • 1...Sd3!
    • 1.Qf5?
      • threat
        • 2.Qd5#
      • 1...c2
        • 2.Qxc2#
      • 1...Kb3!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qb5#
      • 1...c2
        • 2.Qxc2#
      • 1...Sb3
        • 2.Qf1#

Anticipated by 24374(1967)

This anticipates 86957(1997)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD,SBLOCK::QAB(A)
  • Tries
    • Try
      • Q(A);N_PINP(b)
      • Threat
        • QAB1(A)
      • Vars
        • P(b);OGATEB::QAR2(A),XP(b)
      • Refutation
        • S(a);
    • Try
      • Q(A);N_PINP(b)
      • Threat
        • QAB1(A)
      • Vars
        • P(b);OGATEB::QAR2(A),XP(b)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);N_PINP(b)
    • Threat
      • QAB1(A)
    • Vars
      • P(b);OGATEB::QAR2(A),XP(b)
      • S(a);OGATE,SBLOCK::QAB(A)
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