MESON Chess Problem Database

Problem Display
PID: 59506 (4R3/2N3PK/p3N3/4Bp2/2p1kP1b/q1P5/3P4/2n2Q2 w - - 0 1)

Guida, Marco

3rd Prize, The Problemist, 2005/I

4R3/2N3PK/p3N3/4Bp2/2p1kP1b/q1P5/3P4/2n2Q2

#2

10 + 7

4901 Best Problems 2007
56 The Problemist 2007
4901 Best Problems 2011
23 Die Schwalbe 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Sc5#
    • 1...Qc5
      • 2.Sxc5#
    • 1...Qa1
      • 2.Sc5#
    • 1...Qa2
      • 2.Sc5#
    • 1...Qb3
      • 2.Sc5#
    • 1...Qxc3
      • 2.Sc5#
    • 1...Qa4
      • 2.Sc5#
    • 1...Be1
      • 2.Sg5#
    • 1...Bf2
      • 2.Sg5#
    • 1...Bg3
      • 2.Sg5#
    • 1...Bg5
      • 2.Sxg5#
    • 1...Sa2
      • 2.Qe2#
    • 1...Se2
      • 2.Qxe2#
    • 1...Sb3
      • 2.Qe2#
    • 1...Sd3
      • 2.Qe2#
      • 2.Qg2#
      • 2.Qh1#
  • Tries
    • 1.Bd6?
      • threat
        • 2.Sc5#
        • 2.Sg5#
      • 1...Bf2
        • 2.Sd4#
        • 2.Sg5#
      • 1...Se2
        • 2.Sc5#
        • 2.Qxe2#
      • 1...Qc5
        • 2.Sxc5#
        • 2.Sg5#
      • 1...Bg5
        • 2.Sc5#
        • 2.Sxg5#
      • 1...Be7
        • 2.Sg5#
      • 1...Qxc3!
    • 1.Bf6?
      • threat
        • 2.Sc5#
        • 2.Sg5#
      • 1...Se2
        • 2.Sc5#
        • 2.Qxe2#
      • 1...Qc5
        • 2.Sxc5#
        • 2.Sg5#
      • 1...Qe7
        • 2.Sc5#
      • 1...Bg5
        • 2.Sc5#
        • 2.Sxg5#
      • 1...Bf2!
    • 1.Qh3?
      • threat
        • 2.Qe3#
      • 1...Qxc3
        • 2.Sc5#
      • 1...Qc5
        • 2.Sxc5#
      • 1...Bf2
        • 2.Sg5#
      • 1...Bg3!
    • 1.g8Q?
      • threat
        • 2.Qgg2#
      • 1...Qxc3
        • 2.Sc5#
      • 1...Se2
        • 2.Qxe2#
      • 1...Bg3
        • 2.Sg5#
      • 1...Bg5
        • 2.Sxg5#
      • 1...Qe7+!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qf3#
      • 1...Qxc3
        • 2.Bf6#
      • 1...Bf2
        • 2.Bd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 12
  • Sets
    • Q(b);N_GUARD::S(F)
    • Q(b);N_GUARD::S(F),XQ(b)
    • Q(b);N_GUARD,XP(C)::S(F)
    • B(e);N_GUARD::S(F)
    • B(e);N_GUARD::S(F),XB(e)
    • S(a);N_GUARD::QAR2(A)
    • S(a);N_GUARD::QAR2(A),XS(a)
  • Tries
    • Try
      • B(E);
      • Threat
        • DUALS(2)
      • Vars
        • B(e);::S(F)
      • Refutation
        • Q(b);XP(C)
    • Try
      • B(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);P_PINP(H)::S(F)
      • Refutation
        • B(e);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • Q(b);N_GUARD,XP(C)::S(F)
        • Q(b);N_GUARD::S(F),XQ(b)
        • B(e);N_GUARD::S(F)
      • Refutation
        • B(e);
    • Try
      • P(H);
      • Threat
        • QAB(H)
      • Vars
        • Q(b);N_GUARD,XP(C)::S(F)
        • S(a);N_GUARD::QAR2(A),XS(a)
        • B(e);N_GUARD::S(F)
        • B(e);N_GUARD::S(F),XB(e)
      • Refutation
        • Q(b);CHECK
  • Actual
    • S(F);
    • Threat
      • QAB1(A)
    • Vars
      • Q(b);N_GUARD,XP(C)::R(J)+B(E)
      • B(e);N_GUARD::R(J)+B(E)
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