MESON Chess Problem Database

Problem Display
PID: 109201 (1B6/1N2b3/Q1K1P1n1/7R/3pk1pq/2P1P2R/3P4/1b5N w - - 0 1)

Postnikov, Oleksandr Borisovich

6th Comm., Wola Gulowska, 1993

1B6/1N2b3/Q1K1P1n1/7R/3pk1pq/2P1P2R/3P4/1b5N

#2

11 + 7

15345 Wola Gulowska Award 1993
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf2
      • 2.Sxf2#
    • 1...Ba2
      • 2.d3#
    • 1...Bc5
      • 2.Sxc5#
    • 1...Bd6
      • 2.Sxd6#
    • 1...Bf6
      • 2.Sc5#
      • 2.Sd6#
    • 1...Bd8
      • 2.Sc5#
      • 2.Sd6#
    • 1...Sf4
      • 2.Re5#
    • 1...Se5+
      • 2.Rxe5#
    • 1...Sf8
      • 2.Re5#
    • 1...Sh8
      • 2.Re5#
    • 1...dxc3
      • 2.Qc4#
    • 1...dxe3
      • 2.Rxe3#
      • 2.Qc4#
    • 1...d3
      • 2.Qc4#
  • Tries
    • 1.Sg3+?
      • 1...Kf3
        • 2.Qf1#
        • 2.Qe2#
      • 1...Qxg3!
    • 1.Qb5?
      • threat
        • 2.Qf5#
      • 1...Se5+
        • 2.Rxe5#
      • 1...Qxh5
        • 2.Sf2#
      • 1...Qf2
        • 2.Sxf2#
      • 1...Qg5
        • 2.Sf2#
      • 1...Bc5
        • 2.Sxc5#
      • 1...Bg5
        • 2.Sd6#
      • 1...Qf6!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qf5#
      • 1...Se5+
        • 2.Rxe5#
      • 1...Qxh5
        • 2.Sg3#
      • 1...Qf2
        • 2.Sxf2#
      • 1...Qg5
        • 2.Sg3#
      • 1...Qf6
        • 2.Sg3#
      • 1...Bg5
        • 2.Sc5#
      • 1...Sf4
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(e);N_GUARD::S(A),XQ(e)
    • B(a);N_GUARD::P(B)
    • B(g);N_GUARD::S(J),XB(g)
    • S(f);N_GUARD::R1(F)
    • S(f);CHECK,N_GUARD::R1(F),XS(f)
    • P(b);OGATEB,XP(C)::QAR2(G)
    • P(b);OGATEB::QAR2(G)
  • Tries
    • Try
      • S(A);CHECK
      • Refutation
        • Q(e);XS(A)
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • S(f);CHECK,N_GUARD::R1(F),XS(f)
        • Q(e);N_GUARD,XR(F)::S(A)
        • Q(e);N_GUARD::S(A),XQ(e)
        • Q(e);N_GUARD::S(A)
        • B(g);N_GUARD::S(J),XB(g)
        • B(g);N_GUARD::S(J)
      • Refutation
        • Q(e);P_PINP(I)
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • S(f);CHECK,N_GUARD::R1(F),XS(f)
      • Q(e);N_GUARD,XR(F)::S(A)
      • Q(e);N_GUARD::S(A),XQ(e)
      • Q(e);N_GUARD::S(A)
      • Q(e);N_GUARD,P_PINP(I)::S(A)
      • B(g);N_GUARD::S(J)
      • S(f);N_GUARD::R1(F)
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