MESON Chess Problem Database

Problem Display
PID: 51642 (2Q5/b3Kp1p/1p1B4/6p1/pp2k1r1/1P1RP2q/3R2pr/6N1 w - - 0 1)

Kovacevic, Marjan

1st Prize, The Problemist, 2003/II

2Q5/b3Kp1p/1p1B4/6p1/pp2k1r1/1P1RP2q/3R2pr/6N1

#2

8 + 12

145 StrateGems 2005
56 The Problemist 2005
102 Probleemblad 2006
145 StrateGems 2007
23 Die Schwalbe 2008
15174 FIDE Album (2001-2003) 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qh6
      • 2.Qxg4#
    • 1...f5
      • 2.Qe6#
      • 2.Qb7#
      • 2.Qc4#
      • 2.Qc6#
      • 2.Qa8#
    • 1...f6
      • 2.Qe6#
  • Tries
    • 1.Re2?
      • threat
        • 2.Rd4#
      • 1...Kxd3
        • 2.Qc2#
      • 1...Qxe3
        • 2.Rexe3#
      • 1...b5!
    • 1.Rd5?
      • threat
        • 2.Re5#
      • 1...Kxe3
        • 2.Re2#
      • 1...Qxe3
        • 2.Qf5#
      • 1...f6
        • 2.Qe6#
      • 1...Qg3!
    • 1.Qc5?
      • threat
        • 2.Qd5#
        • 2.Qe5#
      • 1...Qg3
        • 2.Qd5#
      • 1...f6
        • 2.Qd5#
      • 1...bxc5!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Rc3#
      • 1...Kf5
        • 2.Rd5#
      • 1...Qxe3
        • 2.Rd4#
      • 1...axb3
        • 2.Rxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(c);N_GUARD::QAR2(H),XR(g)
    • P(k);N_GUARD::QAR2(H)
  • Tries
    • Try
      • R(B);
      • Threat
        • R1(D)
      • Vars
        • K(f);OGATEB,S_FLIGHT,XR(D)::QAB1(H)
        • Q(c);OGATE,P_SPINQ(c),XP(E)::R1(B),XQ(c)
      • Refutation
        • P(i);
    • Try
      • R(D);
      • Threat
        • R1(D)
      • Vars
        • K(f);OGATEB,P-FLIGHT,XP(E)::R1(B)
        • Q(c);SBLOCK,XP(E)::QAB1(H)
        • P(k);N_GUARD::QAR2(H)
      • Refutation
        • Q(c);
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);::QAB1(H)
        • P(k);::QAB1(H)
      • Refutation
        • P(i);XQ(H)
  • Actual
    • Q(H);
    • Threat
      • QAB(H)+R(D)
    • Vars
      • K(f);S_FLIGHT::QAB(H)+R(D),DCHECK
      • Q(c);SBLOCK,XP(E)::QAB(H)+R(D),DCHECK
      • P(d);OGATE,XP(C)::QAB(H)+R(D),XP(d)
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