MESON Chess Problem Database

Problem Display
PID: 133440 (1r6/bp1Qppq1/3p4/6p1/2PPP1Rp/1N1k2n1/2R1nP2/1K3B2 w - - 0 1)

Kirillov, Valery Afanasievich

Maslov, Boris Grigorevich

Variantim, 2008

1r6/bp1Qppq1/3p4/6p1/2PPP1Rp/1N1k2n1/2R1nP2/1K3B2

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Sc1#
    • 1...Bxd4
      • 2.Sc1#
    • 1...Sh1
      • 2.Bxe2#
    • 1...Sxe4
      • 2.Bxe2#
    • 1...Sf5
      • 2.Bxe2#
    • 1...Sh5
      • 2.Bxe2#
  • Tries
    • 1.Qb5?
      • threat
        • 2.c5#
      • 1...Qxd4
        • 2.Sc1#
      • 1...Bc5!
    • 1.Qf5?
      • threat
        • 2.Qf3#
      • 1...Qxd4
        • 2.Sc1#
      • 1...Bxd4
        • 2.Sc1#
      • 1...Sxf1
        • 2.e5#
      • 1...Sxf5
        • 2.Bxe2#
      • 1...Qf6!
    • 1.c5?
      • threat
        • 2.Qb5#
      • 1...Qxd4
        • 2.Sc1#
      • 1...dxc5
        • 2.Sc1#
      • 1...b5!
  • Keys
    • 1.e5!
      • threat
        • 2.Sc1#
      • 1...Sxf1
        • 2.Qf5#
      • 1...Se4
        • 2.Bxe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • Q(k);SBLOCK,XP(G)::S(E)
    • B(g);SBLOCK,XP(G)::S(E)
    • S(c);N_GUARD::B(B),XS(a)
    • S(c);N_GUARD,XP(H)::B(B),XS(a)
  • Tries
    • Try
      • Q(J);
      • Threat
        • QAB(J)+P(F)
      • Vars
        • Q(k);SBLOCK,XP(G)::S(E)
      • Refutation
        • B(g);
    • Try
      • Q(J);
      • Threat
        • QAR2(J)
      • Vars
        • Q(k);SBLOCK,XP(G)::S(E)
        • B(g);SBLOCK,XP(G)::S(E)
        • S(c);N_GUARD,N_SPINS(a),XB(B)::QAB(J)+P(H)
        • S(c);N_GUARD,XQ(J)::B(B),XS(a)
      • Refutation
        • Q(k);
    • Try
      • P(F);
      • Threat
        • QAB(J)
      • Vars
        • Q(k);SBLOCK,XP(G)::S(E)
        • P(f);XP(F)::S(E)
      • Refutation
        • P(h);
  • Actual
    • P(H);
    • Threat
      • S(E)
    • Vars
      • S(c);N_GUARD,N_SPINS(a),XB(B)::QAB(J)
      • S(c);N_GUARD::B(B),XS(a)
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