MESON Chess Problem Database

Problem Display
PID: 148339 (1n2Q3/1pp2PK1/1p1r1pNp/3k1P2/PP4nR/8/2PP1B1b/6r1 w - - 0 1)

Kovacevic, Marjan

3rd Prize, Neue Zurcher Zeitung, 2006-2007

1n2Q3/1pp2PK1/1p1r1pNp/3k1P2/PP4nR/8/2PP1B1b/6r1

#2

11 + 11

23 Die Schwalbe 2012
56 The Problemist 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qb5#
    • 1...Re6
      • 2.Qxe6#
    • 1...Rd7
      • 2.Qe6#
    • 1...Rd8
      • 2.Qe6#
    • 1...Sxf2
      • 2.c4#
    • 1...Se3
      • 2.Qe4#
    • 1...Se5
      • 2.Rd4#
  • Tries
    • 1.Sf4+?
      • 1...Kc4
        • 2.Qb5#
      • 1...Bxf4!
    • 1.Qe6+?
      • 1...Kc6
        • 2.Se7#
        • 2.b5#
      • 1...Rxe6!
    • 1.d3?
      • threat
        • 2.Qe4#
        • 2.c4#
      • 1...Sxf2
        • 2.c4#
      • 1...Re6
        • 2.Qxe6#
      • 1...Rd7
        • 2.Qe6#
      • 1...Rd8
        • 2.Qe6#
      • 1...Sd7
        • 2.Qe4#
      • 1...Rc1
        • 2.Qe4#
      • 1...Re1
        • 2.c4#
      • 1...Be5
        • 2.Se7#
        • 2.c4#
      • 1...Se3
        • 2.Qe4#
      • 1...Se5
        • 2.Rd4#
      • 1...b5
        • 2.Qe4#
      • 1...Rc6!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Se7#
      • 1...Kc6
        • 2.Qb5#
      • 1...Sxf2
        • 2.Qc4#
      • 1...Re6
        • 2.Qxe6#
      • 1...Rd7
        • 2.Qe6#
      • 1...Rd8
        • 2.Qe6#
      • 1...Rc6
        • 2.Qd3#
      • 1...Se3
        • 2.Qf3#
      • 1...Se5
        • 2.Qe4#
      • 1...Sc6
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(d);P_SPINS(c),S_FLIGHT::QAB1(K)
    • R(f);N_GUARD::QAB1(K),XR(f)
    • R(f);N_GUARD,P_PINP(I)::QAB1(K)
    • R(f);N_GUARD::QAB1(K)
    • S(c);P_PINS(H),XB(C)::P(A)
    • S(c);P_PINS(H)::QAB1(K)
    • S(c);OGATE,P_PINS(H)::R1(F)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(d);S_FLIGHT::QAB1(K)
      • Refutation
        • B(b);XS(H)
    • Try
      • Q(K);CHECK
      • Refutation
        • R(f);XQ(K)
    • Try
      • P(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);P_PINS(H),XB(C)::P(A)
        • R(f);N_GUARD::QAB1(K),XR(f)
        • R(f);N_GUARD,P_PINP(I)::QAB1(K)
        • R(f);N_GUARD::QAB1(K)
        • S(k);::QAB1(K)
        • R(a);::QAB1(K)
        • R(a);::P(A)
        • S(c);P_PINS(H)::QAB1(K)
        • S(c);OGATE,P_PINS(H)::R1(F)
        • P(e);::QAB1(K)
      • Refutation
        • R(f);
  • Actual
    • Q(K);
    • Threat
      • S(H)
    • Vars
      • K(d);S_FLIGHT::QAB1(K)
      • S(c);P_PINS(H),XB(C)::QAB1(K)
      • R(f);N_GUARD::QAB1(K),XR(f)
      • R(f);N_GUARD,P_PINP(I)::QAB1(K)
      • R(f);N_GUARD::QAB1(K)
      • R(f);SBLOCK::QAR2(K)
      • S(c);P_PINS(H)::QAB(K)
      • S(c);P_PINS(H)::QAB1(K)
      • S(k);SBLOCK::P(A)
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