MESON Chess Problem Database

Problem Display
PID: 250641 (1K6/n1p2Nn1/1bP5/p1k5/Qp1p1R2/PP6/2P2P2/6BB w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Schakend Nederland, 1983

1K6/n1p2Nn1/1bP5/p1k5/Qp1p1R2/PP6/2P2P2/6BB

#2

11 + 8

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc6+
      • 2.Qxc6#
    • 1...Sf5
      • 2.Rxf5#
    • 1...Sh5
      • 2.Rf5#
    • 1...Se6
      • 2.Rf5#
    • 1...Se8
      • 2.Rf5#
    • 1...bxa3
      • 2.Qc4#
    • 1...d3
      • 2.Rc4#
  • Tries
    • 1.Sd8?
      • threat
        • 2.Sb7#
      • 1...Sxc6+
        • 2.Qxc6#
      • 1...Kd6!
    • 1.Re4?
      • threat
        • 2.Re5#
      • 1...Kd5
        • 2.Re5#
      • 1...d3
        • 2.Rc4#
      • 1...Sxc6+!
    • 1.Qxa5+?
      • 1...Sb5
        • 2.Qxb4#
        • 2.axb4#
      • 1...Bxa5!
    • 1.c3?
      • threat
        • 2.cxd4#
      • 1...Sxc6+
        • 2.Qxc6#
      • 1...bxc3
        • 2.Qc4#
      • 1...dxc3
        • 2.Rc4#
      • 1...Sf5
        • 2.Rxf5#
      • 1...Se6
        • 2.Rf5#
      • 1...d3
        • 2.Rc4#
      • 1...Sb5!
  • Keys
    • 1.c4!
      • 1...Sxc6+
        • 2.Qxc6#
      • 1...bxa3
        • 2.Qxa3#
      • 1...bxc4 ep
        • 2.Qc4#
      • 1...dxc4 ep
        • 2.Rc4#
      • 1...Sb5
        • 2.Qxb5#
      • 1...Sc8
        • 2.Qb5#
      • 1...Sf5
        • 2.Rxf5#
      • 1...Sh5
        • 2.Rf5#
      • 1...Se6
        • 2.Rf5#
      • 1...Se8
        • 2.Rf5#
      • 1...d3
        • 2.f3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(f);CHECK,OGATE,XP(I)::QAR1(G),XS(f)
    • S(h);N_GUARD::R(H),XS(h)
    • S(h);N_GUARD::R(H)
    • P(a);OGATE,XP(E)::QAR1(G)
    • P(b);OGATE::R1(H)
  • Tries
    • Try
      • S(J);
      • Threat
        • S(J)
      • Vars
        • S(f);CHECK,OGATE,XP(I)::QAR1(G),XS(f)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(H);
      • Threat
        • R(H)
      • Vars
        • K(d);P-FLIGHT::B(B)+R(H),DCHECK
        • P(b);OGATE::R1(H)
      • Refutation
        • S(f);CHECK,XP(I)
    • Try
      • Q(G);CHECK,XP(c)
      • Refutation
        • B(e);XQ(G)
    • Try
      • P(C);
      • Threat
        • P(C),XP(b)
      • Vars
        • S(f);CHECK,OGATE,XP(I)::QAR1(G),XS(f)
        • P(a);OGATE,XP(C)::QAR1(G)
        • P(b);OGATE,XP(C)::R1(H)
        • S(h);N_GUARD::R(H),XS(h)
        • S(h);N_GUARD::R(H)
        • P(b);OGATE::R1(H)
      • Refutation
        • S(f);
  • Actual
    • P(C);
    • Vars
      • S(f);CHECK,OGATE,XP(I)::QAR1(G),XS(f)
      • P(a);OGATE,XP(E)::QAB(G),XP(a)
      • P(a);EP,OGATE,XP(C)::QAR1(G)
      • P(b);EP,OGATE,XP(C)::R1(H)
      • S(f);N_GUARD::QAR1(G),XS(f)
      • S(f);N_GUARD::QAR1(G)
      • S(h);N_GUARD::R(H),XS(h)
      • S(h);N_GUARD::R(H)
      • P(b);::B(A)+P(D)
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