MESON Chess Problem Database

Problem Display
PID: 158396 (2r2n2/2p3Q1/5R2/2p1Np2/2Pkp3/1P1N4/1K1Bn3/3R2qb w - - 0 1)

Kovacevic, Marjan

2nd Prize, Chepizhni-80 JT, 2015

2r2n2/2p3Q1/5R2/2p1Np2/2Pkp3/1P1N4/1K1Bn3/3R2qb

#2

9 + 10

56 The Problemist 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Se6
      • 2.Qd7#
    • 1...Sg6
      • 2.Qd7#
    • 1...Sd7
      • 2.Qxd7#
    • 1...Sh7
      • 2.Qd7#
    • 1...c6
      • 2.Rd6#
  • Tries
    • 1.Sg4?
      • threat
        • 2.Rd6#
      • 1...Kxd3
        • 2.Be1#
      • 1...exd3
        • 2.Re6#
      • 1...Se6
        • 2.Qd7#
      • 1...e3!
    • 1.Be3+?
      • 1...Qxe3
        • 2.Sc6#
      • 1...Kxe3!
    • 1.Qxg1+?
      • 1...e3
        • 2.Qxe3#
      • 1...Sxg1!
  • Keys
    • 1.Sf2!
      • threat
        • 2.Sc6#
      • 1...Kxe5
        • 2.Rg6#
      • 1...Qxf2
        • 2.Bf4#
      • 1...e3
        • 2.Bc3#
      • 1...c6
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(j);N_GUARD::QAR(I)
    • S(j);N_GUARD::QAR(I),XS(j)
    • P(h);N_GUARD::R(H)
  • Tries
    • Try
      • S(G);
      • Threat
        • QAB(I)+R(H),DCHECK
      • Vars
        • K(d);OGATEB,P-FLIGHT,XS(E)::R(A)+B(C)
        • P(e);SBLOCK,XS(E)::QAB(I)+R(H)
        • S(j);N_GUARD::QAR(I)
      • Refutation
        • P(e);
    • Try
      • B(C);CHECK
      • Vars
        • Q(a);SBLOCK,XB(C)::S(G)
      • Refutation
        • K(d);S_FLIGHT,XB(C)
    • Try
      • Q(I);CHECK,XQ(a)
      • Vars
        • P(e);P_SPINP(e)::QAB1(I),XP(e)
      • Refutation
        • S(c);XQ(I)
  • Actual
    • S(E);
    • Threat
      • S(G)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(G)::QAB(I)+R(H)
      • Q(a);N_GUARD,XS(E)::R(A)+B(C)
      • P(e);SBLOCK::R(A)+B(C),DCHECK
      • P(h);N_GUARD::R(H)
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