MESON Chess Problem Database

Problem Display
PID: 103886 (8/q1p1b3/PPpPP3/p1k1N3/P1B1PQ2/3R4/KR6/5n1n w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Revista Romana de Sah, 1983

8/q1p1b3/PPpPP3/p1k1N3/P1B1PQ2/3R4/KR6/5n1n

#2

12 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qe3#
    • 1...Sh2
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sfg3
      • 2.Qe3#
  • Tries
    • 1.Bb5?
      • threat
        • 2.Sd7#
      • 1...Kxb6
        • 2.Sd7#
      • 1...cxb5
        • 2.Rxb5#
      • 1...cxb6
        • 2.Qc1#
      • 1...cxd6!
    • 1.Bd5?
      • threat
        • 2.Sd7#
      • 1...Kxd6
        • 2.Sd7#
      • 1...cxd5
        • 2.Rxd5#
      • 1...cxd6
        • 2.Qc1#
      • 1...cxb6!
    • 1.Qf2+?
      • 1...Se3
        • 2.Qxe3#
      • 1...Sxf2!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Sd7#
      • 1...cxb6
        • 2.Bb5#
      • 1...cxd6
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(a);N_GUARD::QAB(G)
    • S(a);N_GUARD::QAB(G),XS(a)
  • Tries
    • Try
      • B(E);
      • Threat
        • S(H)
      • Vars
        • K(d);S_FLIGHT,XP(J)::S(H)
        • P(e);OGATE,XB(E)::R1(B),XP(e)
        • P(g);SBLOCK,XP(J)::QAR(G)
      • Refutation
        • P(g);XP(K)
    • Try
      • B(E);
      • Threat
        • S(H)
      • Vars
        • K(d);S_FLIGHT,XP(K)::QAB(G)+S(H)
        • P(e);OGATE,XB(E)::R1(C),XP(e)
        • P(g);SBLOCK,XP(K)::QAR(G)
      • Refutation
        • P(g);XP(J)
    • Try
      • Q(G);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB(G),XS(a)
      • Refutation
        • S(b);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • S(H)
    • Vars
      • P(g);SBLOCK,XP(J)::QAR(G)+B(E)
      • P(g);SBLOCK,XP(K)::QAR(G)+B(E)
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