MESON Chess Problem Database

Problem Display
PID: 31253 (8/5b2/2p1n2n/6p1/N1BPk3/K1Q2RP1/1Bp1qPP1/4N3 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Rudenko, Valentin Fedorovich

20/21 Place, 06. WCCT, 1998-2000

8/5b2/2p1n2n/6p1/N1BPk3/K1Q2RP1/1Bp1qPP1/4N3

#2

11 + 8

3447 06. WCCT Award 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Qe3#
    • 1...Qf1
      • 2.Qe3#
    • 1...Qd3
      • 2.Qxd3#
    • 1...Qxf3
      • 2.Qxf3#
    • 1...Qxe1
      • 2.Qxe1#
      • 2.Qxc2#
      • 2.Qd3#
    • 1...Qxf2
      • 2.Qd3#
    • 1...Qe3
      • 2.Qxe3#
    • 1...Sxd4
      • 2.Qxd4#
    • 1...Sc5
      • 2.Sxc5#
    • 1...Sc7
      • 2.Sc5#
    • 1...Sg7
      • 2.Sc5#
    • 1...Sd8
      • 2.Sc5#
    • 1...Sf8
      • 2.Sc5#
  • Tries
    • 1.Bxe6?
      • threat
        • 2.Sc5#
        • 2.Qxc6#
      • 1...Qxf3
        • 2.Sc5#
        • 2.Qxf3#
        • 2.gxf3#
      • 1...c1Q
        • 2.Sc5#
      • 1...c1R
        • 2.Sc5#
      • 1...Qd3
        • 2.Sc5#
        • 2.Qxd3#
      • 1...Qc4
        • 2.Re3#
        • 2.Qe3#
      • 1...Qb5
        • 2.Re3#
        • 2.Qe3#
      • 1...Qa6
        • 2.Re3#
        • 2.Qe3#
      • 1...Qe3
        • 2.Sc5#
        • 2.Rxe3#
        • 2.Qxe3#
      • 1...Be8
        • 2.Sc5#
      • 1...c5
        • 2.Sxc5#
      • 1...Bxe6!
    • 1.Qxc2+?
      • 1...Qd3+
        • 2.Qxd3#
      • 1...Qxc2!
    • 1.d5?
      • threat
        • 2.Qe5#
      • 1...Qxf3
        • 2.Qxf3#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Qd3
        • 2.Qxd3#
      • 1...Qe3
        • 2.Qxe3#
      • 1...Sg4!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qe5#
      • 1...Qd3+
        • 2.Bxd3#
      • 1...Qxf3+
        • 2.gxf3#
      • 1...Qe3+
        • 2.Rxe3#
      • 1...Sxd4
        • 2.Sc3#
      • 1...Sc5
        • 2.Sxc5#
      • 1...Sg4
        • 2.Qf5#
      • 1...c5
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(b);N_GUARD::QAR1(F)
    • Q(b);N_GUARD,P_PINQ(F)::QAB1(F),XQ(b)
    • Q(b);OGATE,P_PINQ(F),XR(G)::QAB1(F),XQ(b)
    • Q(b);N_GUARD,XP(C)::QAB1(F)
    • Q(b);N_GUARD,P_PINQ(F)::QAR1(F),XQ(b)
    • S(f);OGATE,XP(K)::QAR1(F),XS(f)
    • S(f);N_GUARD::S(I),XS(f)
    • S(f);N_GUARD::S(I)
  • Tries
    • Try
      • B(J);XS(f)
      • Threat
        • DUALS(2)
      • Vars
        • P(a);P_PINB(B)::S(I)
        • P(a);::S(I)
        • B(h);::S(I)
        • P(e);::S(I),XP(e)
      • Refutation
        • B(h);XB(J)
    • Try
      • Q(F);CHECK,XP(a)
      • Vars
        • Q(b);CHECK,N_GUARD,P_SPINQ(b)::QAB1(F),XQ(b)
      • Refutation
        • Q(b);XQ(F)
    • Try
      • P(K);
      • Threat
        • QAR1(F)
      • Vars
        • Q(b);OGATE,P_PINQ(F),XR(G)::QAB1(F),XQ(b)
        • S(f);N_GUARD::QAR1(F),XS(f)
        • Q(b);N_GUARD,P_PINQ(F)::QAB1(F),XQ(b)
        • Q(b);N_GUARD,P_PINQ(F)::QAR1(F),XQ(b)
      • Refutation
        • S(g);
  • Actual
    • Q(F);
    • Threat
      • QAR1(F)
    • Vars
      • Q(b);CHECK,N_GUARD::B(J),XQ(b)
      • Q(b);CHECK,OGATE,XR(G)::P(D),XQ(b)
      • Q(b);CHECK,N_GUARD::R1(G),XQ(b)
      • S(f);SBLOCK,XP(K)::S(I)
      • S(f);N_GUARD::S(I),XS(f)
      • S(g);N_GUARD::QAB1(F)
      • P(e);OGATEB::QAB(F)
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