MESON Chess Problem Database

Problem Display
PID: 219025 (8/6KQ/8/2NpN3/3k4/1R1p4/8/8 w - - 0 1)

Klark, Dmitry Vasilevich

L'Opinion Publique, 1881

8/6KQ/8/2NpN3/3k4/1R1p4/8/8

#2

5 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Scd7?
      • threat
        • 2.Rxd3#
        • 2.Qxd3#
      • 1...d2
        • 2.Rd3#
        • 2.Qd3#
        • 2.Qh4#
      • 1...Ke3!
    • 1.Sed7?
      • threat
        • 2.Qxd3#
      • 1...Kc4
        • 2.Qxd3#
      • 1...d2
        • 2.Qd3#
        • 2.Qh4#
      • 1...Ke3!
    • 1.Qe4+?
      • 1...Kxc5
        • 2.Qb4#
      • 1...dxe4!
    • 1.Qh4+?
      • 1...Kxc5
        • 2.Qb4#
      • 1...Kxe5
        • 2.Qf6#
      • 1...Ke3!
  • Keys
    • 1.Qh6!
      • 1...Kxc5
        • 2.Qb6#
      • 1...Kxe5
        • 2.Qf6#
      • 1...d2
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • S(C);
      • Threat
        • QAR1(E),XP(a)
      • Vars
        • K(b);P-FLIGHT::QAB1(E),XP(a)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT,XS(B)::QAB1(E)
      • Refutation
        • P(c);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT,XS(B)::QAB1(E)
        • K(b);OGATEB,S_FLIGHT,XS(C)::QAB1(E)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(b);OGATEB,S_FLIGHT,XS(B)::QAB1(E)
      • K(b);OGATEB,S_FLIGHT,XS(C)::QAB1(E)
      • P(a);::QAB1(E)
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