MESON Chess Problem Database

Problem Display
PID: 207202 (1b6/p2p2Q1/3R4/k2p4/p1r5/N1P3p1/6K1/5B2 w - - 0 1)

Klark, Dmitry Vasilevich

La Strategie, 1868

1b6/p2p2Q1/3R4/k2p4/p1r5/N1P3p1/6K1/5B2

#2

6 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc3
      • 2.Qxc3#
    • 1...Rb4
      • 2.Ra6#
    • 1...Rd4
      • 2.Ra6#
    • 1...Re4
      • 2.Ra6#
    • 1...Rf4
      • 2.Ra6#
    • 1...Rg4
      • 2.Ra6#
    • 1...Rh4
      • 2.Ra6#
    • 1...Rc5
      • 2.Ra6#
    • 1...Rc7
      • 2.Ra6#
    • 1...Rc8
      • 2.Ra6#
  • Tries
    • 1.Sxc4+?
      • 1...dxc4
        • 2.Qe5#
        • 2.Qg5#
      • 1...Kb5!
    • 1.Bxc4?
      • threat
        • 2.Ra6#
      • 1...dxc4
        • 2.Qe5#
        • 2.Qg5#
      • 1...a6
        • 2.Rxa6#
      • 1...Bxd6!
  • Keys
    • 1.Qd4!
      • 1...Rxc3
        • 2.Ra6#
        • 2.Qxc3#
      • 1...Rxd4
        • 2.Ra6#
      • 1...Bxd6
        • 2.Qxa7#
      • 1...Rb4
        • 2.Ra6#
        • 2.Qxb4#
        • 2.cxb4#
      • 1...Rc5
        • 2.Ra6#
        • 2.Qxc5#
        • 2.Qb4#
      • 1...Rc6
        • 2.Qb4#
      • 1...Rc7
        • 2.Ra6#
        • 2.Qb4#
      • 1...Rc8
        • 2.Ra6#
        • 2.Qb4#
      • 1...Bc7
        • 2.Qxa7#
      • 1...a6
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • R(c);OGATE,XP(D)::QAB(F),XR(c)
    • R(c);::R1(E)
    • R(c);SBLOCK::R1(E)
  • Tries
    • Try
      • S(C);CHECK,XR(c)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • B(A);XR(c)
      • Threat
        • R1(E)
      • Vars
        • P(f);::R1(E),XP(f)
      • Refutation
        • B(h);XR(E)
  • Actual
    • Q(F);
    • Vars
      • R(c);XQ(F)::R1(E)
      • B(h);N_GUARD,XR(E)::QAR2(F),XP(f)
      • R(c);OGATE::QAB1(F)
      • B(h);N_GUARD::QAR2(F),XP(f)
      • P(f);N_GUARD::QAB1(F)
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