MESON Chess Problem Database

Problem Display
PID: 103888 (3N4/1r1p4/Rp4b1/1Q3B2/KPPk1p1n/2pP4/5P2/3R2Bq w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Hlas l'udu, 1987

3N4/1r1p4/Rp4b1/1Q3B2/KPPk1p1n/2pP4/5P2/3R2Bq

#2

11 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.dxe4#
    • 1...Qd5
      • 2.Qxd5#
    • 1...Qc6
      • 2.f3#
    • 1...Qxg1
      • 2.Qd5#
    • 1...Qh2
      • 2.Qd5#
    • 1...Qh3
      • 2.Qd5#
      • 2.f3#
    • 1...Sg2
      • 2.Qd5#
    • 1...Sf3
      • 2.Qd5#
    • 1...f3
      • 2.Qd5#
    • 1...d5
      • 2.Sc6#
    • 1...d6
      • 2.Se6#
  • Tries
    • 1.Sc6+?
      • 1...Qxc6
        • 2.f3#
      • 1...dxc6!
    • 1.Qxb6+?
      • 1...Ke5
        • 2.Qf6#
      • 1...Rxb6!
  • Keys
    • 1.Ra5!
      • threat
        • 2.Qe5#
      • 1...bxa5
        • 2.Qc5#
      • 1...Qd5
        • 2.Qxd5#
      • 1...d5
        • 2.Sc6#
      • 1...Qe4
        • 2.dxe4#
      • 1...Qc6
        • 2.f3#
      • 1...Sf3
        • 2.Qd5#
      • 1...d6
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(a);OGATE::R(A)+P(D),XQ(a)
    • Q(a);N_GUARD::QAR1(H),XQ(a)
    • Q(a);N_GUARD,P_PINQ(H)::B(B)+P(C)
    • Q(a);N_GUARD,XB(B)::QAR1(H)
    • Q(a);N_GUARD::QAR1(H)
    • S(e);S_CUTQ(a)::QAR1(H)
    • P(d);S_CUTQ(a)::QAR1(H)
    • P(i);N_GUARD,S_CUTQ(a)::S(K)
    • P(i);N_GUARD::S(K)
  • Tries
    • Try
      • S(K);CHECK
      • Vars
        • Q(a);P_PINQ(H),XS(K)::B(B)+P(C)
      • Refutation
        • P(i);XS(K)
    • Try
      • Q(H);CHECK,XP(f)
      • Vars
        • K(c);S_FLIGHT::QAB1(H)
      • Refutation
        • R(h);XQ(H)
  • Actual
    • R(J);
    • Threat
      • QAB1(H)
    • Vars
      • P(f);N_GUARD,XR(J)::QAB1(H)
      • Q(a);N_GUARD::QAR1(H),XQ(a)
      • P(i);N_GUARD,S_CUTQ(a)::S(K)
      • Q(a);OGATE::R(A)+P(D),XQ(a)
      • Q(a);N_GUARD,P_PINQ(H)::B(B)+P(C)
      • S(e);S_CUTQ(a)::QAR1(H)
      • P(i);N_GUARD::S(K)
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Developed and maintained by Brian Stephenson.
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