MESON Chess Problem Database

Problem Display
PID: 171449 (8/8/p3r3/kP6/3Q4/1KN5/8/8 w - - 0 1)

Antipov, Viacheslav Pavlovich

Shakh-M (Borovich), 1998

8/8/p3r3/kP6/3Q4/1KN5/8/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Qd8#
    • 1...Re2
      • 2.Qd8#
    • 1...Re3
      • 2.Qd8#
    • 1...Re4
      • 2.Qd8#
    • 1...Re5
      • 2.Qd8#
    • 1...Rb6
      • 2.Qa4#
      • 2.Qb4#
  • Tries
    • 1.b6?
      • threat
        • 2.Qc5#
        • 2.Qb4#
      • 1...Rc6
        • 2.Qb4#
      • 1...Re4
        • 2.Qc5#
      • 1...Re5
        • 2.Qb4#
      • 1...Rxb6+!
  • Keys
    • 1.Qc5!
      • threat
        • 2.b6#
      • 1...axb5
        • 2.Qxb5#
      • 1...Re5
        • 2.Qc7#
      • 1...Rb6
        • 2.Qa3#
        • 2.Qb4#
      • 1...Rc6
        • 2.bxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD::QAB(C)
    • R(c);N_GUARD,P_PINS(B)::QAB(C)
  • Tries
    • Try
      • P(D);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::QAB1(C)
        • R(c);::QAR2(C)
      • Refutation
        • R(c);CHECK,XP(D)
  • Actual
    • Q(C);
    • Threat
      • QAR(C)+P(D)
    • Vars
      • P(b);OGATE,P_SPINP(b),XP(D)::QAR1(C),XP(b)
      • R(c);N_GUARD::QAB(C)
      • R(c);OGATE::QAR(C)+P(D),XR(c)
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