MESON Chess Problem Database

Problem Display
PID: 135720 (8/8/1pp5/1ppP3R/bBkP4/1rpN1N2/B1K1P3/2Q5 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

1st Prize, Echo, 2000

8/8/1pp5/1ppP3R/bBkP4/1rpN1N2/B1K1P3/2Q5

#2

10 + 8

56 The Problemist 2010

SOLUTION

  • SOUND
  • Tries
    • 1.Sd2+?
      • 1...Kxd4
        • 2.Qg1#
      • 1...cxd2!
    • 1.Bxc3?
      • threat
        • 2.Sb2#
        • 2.Sd2#
      • 1...cxd4
        • 2.Sd2#
      • 1...b4!
    • 1.Qa3?
      • 1...cxb4
        • 2.Qxb4#
      • 1...cxd5
        • 2.Sde5#
      • 1...cxd4!
    • 1.Qe3?
      • 1...cxd4
        • 2.Qxd4#
      • 1...cxd5
        • 2.Sfe5#
      • 1...cxb4!
    • 1.Qf4?
      • threat
        • 2.dxc5#
      • 1...cxd4
        • 2.Qxd4#
      • 1...cxd5
        • 2.Sfe5#
      • 1...cxb4!
    • 1.Qh6?
      • 1...cxb4
        • 2.Qxc6#
      • 1...cxd4
        • 2.Qxc6#
      • 1...cxd5!
    • 1.Qg1?
      • 1...cxd4
        • 2.Qxd4#
      • 1...cxd5
        • 2.Sfe5#
      • 1...cxb4!
    • 1.e4?
      • 1...cxb4
        • 2.Sde5#
      • 1...cxd4
        • 2.Sfe5#
      • 1...cxd5!
  • Keys
    • 1.Kd1!
      • threat
        • 2.Qxc3#
      • 1...c2+
        • 2.Qxc2#
      • 1...cxb4
        • 2.Sb2#
      • 1...cxd4
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(d);N_SPINR(a),P-FLIGHT,XP(H)::QAB(A)
      • Refutation
        • P(b);XS(F)
    • Try
      • B(G);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(f);XP(H)::S(F)
      • Refutation
        • P(e);
    • Try
      • Q(A);
      • Vars
        • P(f);OGATE,XB(G)::QAR1(A),XP(f)
        • P(h);SBLOCK,XP(I)::S(E)
      • Refutation
        • P(f);XP(H)
    • Try
      • Q(A);
      • Vars
        • P(f);OGATE,XP(H)::QAR1(A),XP(f)
        • P(h);SBLOCK,XP(I)::S(F)
      • Refutation
        • P(f);XB(G)
    • Try
      • Q(A);
      • Threat
        • QAR(A)+P(H),XP(f)
      • Vars
        • P(f);OGATE,P_SPINP(f),XP(H)::QAR1(A),XP(f)
        • P(h);SBLOCK,XP(I)::S(F)
      • Refutation
        • P(f);XB(G)
    • Try
      • Q(A);
      • Vars
        • P(f);OGATEB,XB(G)::QAR2(A),XP(h)
        • P(f);OGATEB,XP(H)::QAR2(A),XP(h)
      • Refutation
        • P(h);XP(I)
    • Try
      • Q(A);
      • Vars
        • P(f);OGATE,XP(H)::QAR1(A),XP(f)
        • P(h);SBLOCK,XP(I)::S(F)
      • Refutation
        • P(f);XB(G)
    • Try
      • P(D);
      • Vars
        • P(f);SBLOCK,XB(G)::S(E)
        • P(f);SBLOCK,XP(H)::S(F)
      • Refutation
        • P(h);XP(I)
  • Actual
    • K(C);P_PINP(b),S_FLIGHT
    • Threat
      • QAR1(A),XP(b)
    • Vars
      • P(b);CHECK,OGATEB::QAR2(A),XP(b)
      • P(f);SBLOCK,XB(G)::S(E)
      • P(f);SBLOCK,XP(H)::S(F)
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