MESON Chess Problem Database

Problem Display
PID: 49640 (2NQ1R2/p3p3/K3k2r/6b1/1R4n1/3p2N1/1B6/n3r3 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

1st Prize, Odessa Festival, 1988

2NQ1R2/p3p3/K3k2r/6b1/1R4n1/3p2N1/1B6/n3r3

#2

7 + 9

4640 Chess Wizardry: The New ABC of Chess Problems 1996
5159 FIDE Album (1986-1988) (Annexe) 1996
56 The Problemist 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Re4#
  • Tries
    • 1.Sb6?
      • threat
        • 2.Qd5#
        • 2.Qd7#
      • 1...axb6
        • 2.Rxb6#
      • 1...Re5
        • 2.Qd7#
      • 1...Se3
        • 2.Re4#
        • 2.Qd7#
      • 1...Se5
        • 2.Qd5#
      • 1...Sf6!
    • 1.Rb5?
      • threat
        • 2.Qd5#
      • 1...Se3
        • 2.Re5#
      • 1...Sf6
        • 2.Qxe7#
      • 1...Re5!
    • 1.Rb7?
      • threat
        • 2.Qd7#
      • 1...Sf6
        • 2.Rxe7#
      • 1...Se5!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Qd5#
      • 1...Ke5+
        • 2.Rd6#
      • 1...Re5
        • 2.Qd7#
      • 1...Se3
        • 2.Re4#
      • 1...Sf6
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(d);N_GUARD,S_CUTR(b)::R(C)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(h);OGATE,XS(E)::R(C),XP(h)
        • R(b);::QAB1(F)
        • S(d);::QAB1(F)
      • Refutation
        • S(d);
    • Try
      • R(C);
      • Threat
        • QAB1(F)
      • Vars
        • S(d);N_GUARD,S_CUTR(b)::R1(C)
        • S(d);S_CUTB(e)::QAR1(F),XP(i)
      • Refutation
        • R(b);
    • Try
      • R(C);
      • Threat
        • QAB1(F)
      • Vars
        • S(d);S_CUTB(e)::R1(C),XP(i)
      • Refutation
        • S(d);
  • Actual
    • R(C);
    • Threat
      • QAB1(F)
    • Vars
      • K(f);CHECK,P-FLIGHT::B(A)+R(C)
      • R(b);SBLOCK::QAB1(F)
      • S(d);N_GUARD,S_CUTR(b)::R(C)
      • S(d);S_CUTB(e)::QAR1(F),XP(i)
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