MESON Chess Problem Database

Problem Display
PID: 200181 (5R2/4n3/3p4/3BkpB1/QN2b3/1N6/p1p4R/2K5 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Udartsev, Valentin Filipovich

Suomen Shakki, 1990

5R2/4n3/3p4/3BkpB1/QN2b3/1N6/p1p4R/2K5

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...a1Q+
      • 2.Qxa1#
    • 1...a1S
      • 2.Qxa1#
    • 1...a1B
      • 2.Qxa1#
    • 1...a1R+
      • 2.Qxa1#
    • 1...f4
      • 2.Bxf4#
  • Tries
    • 1.Sd3+?
      • 1...Bxd3
        • 2.Qd4#
      • 1...Kxd5!
    • 1.Rh6?
      • threat
        • 2.Re6#
      • 1...a1Q+
        • 2.Qxa1#
      • 1...a1R+
        • 2.Qxa1#
      • 1...Bxd5
        • 2.Sd3#
      • 1...Sxd5
        • 2.Sc6#
      • 1...Sg6!
    • 1.Rf6?
      • threat
        • 2.Re6#
      • 1...a1Q+
        • 2.Qxa1#
      • 1...a1R+
        • 2.Qxa1#
      • 1...Bxd5
        • 2.Sd3#
      • 1...Sxd5
        • 2.Sc6#
      • 1...f4!
  • Keys
    • 1.Qa5!
      • 1...a1Q+
        • 2.Qxa1#
      • 1...a1R+
        • 2.Qxa1#
      • 1...Bxd5
        • 2.Re2#
      • 1...Sxd5
        • 2.Re8#
      • 1...a1S
        • 2.Qxa1#
      • 1...a1B
        • 2.Qxa1#
      • 1...Bh1
        • 2.Sd3#
      • 1...Bg2
        • 2.Sd3#
      • 1...Bd3
        • 2.Sxd3#
      • 1...Bf3
        • 2.Sd3#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Sg6
        • 2.Sc6#
      • 1...Sc8
        • 2.Sc6#
      • 1...Sg8
        • 2.Sc6#
      • 1...f4
        • 2.Bxf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • P(a);CHECK,OGATE::QAB(D),XQ(a)
    • P(a);OGATE::QAB(D),XS(a)
    • P(a);OGATE::QAB(D),XB(a)
    • P(a);CHECK,OGATE::QAB(D),XR(a)
    • P(e);::B(G),XP(e)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • B(c);XS(E)::QAB1(D)
      • Refutation
        • K(d);P-FLIGHT,XB(F)
    • Try
      • R(B);
      • Threat
        • R1(B)
      • Vars
        • P(a);CHECK,OGATE::QAB(D),XQ(a)
        • P(a);CHECK,OGATE::QAB(D),XR(a)
        • B(c);N_GUARD,SBLOCK,XB(F)::S(E)
        • S(g);N_GUARD,SBLOCK,XB(F)::S(E)
      • Refutation
        • S(g);
    • Try
      • R(H);
      • Threat
        • R1(H)
      • Vars
        • P(a);CHECK,OGATE::QAB(D),XQ(a)
        • P(a);CHECK,OGATE::QAB(D),XR(a)
        • B(c);N_GUARD,SBLOCK,XB(F)::S(E)
        • S(g);N_GUARD,SBLOCK,XB(F)::S(E)
      • Refutation
        • P(e);
  • Actual
    • Q(D);
    • Vars
      • P(a);CHECK,OGATE::QAB(D),XQ(a)
      • P(a);CHECK,OGATE::QAB(D),XR(a)
      • B(c);OGATEB,P_SPINB(c),XB(F)::R(B)
      • S(g);OGATEB,P_SPINS(g),XB(F)::R(H)
      • P(a);OGATE::QAB(D),XS(a)
      • P(a);OGATE::QAB(D),XB(a)
      • B(c);N_GUARD::S(E)
      • B(c);N_GUARD::S(E),XB(c)
      • S(g);N_GUARD::S(E),XS(g)
      • S(g);N_GUARD::S(E)
      • P(e);::B(G),XP(e)
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