MESON Chess Problem Database

Problem Display
PID: 174488 (5k2/1K3p2/3N1Qb1/3B4/8/8/8/8 w - - 0 1)

Volchek, Viktor Fedorovich

1st Prize, Melnichenko-65 JT, 2004

5k2/1K3p2/3N1Qb1/3B4/8/8/8/8

#2

4 + 3

6490 yacpdb 2018
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qxf7#
    • 1...Bc2
      • 2.Qxf7#
    • 1...Bd3
      • 2.Qxf7#
    • 1...Be4
      • 2.Qxf7#
    • 1...Bf5
      • 2.Qxf7#
    • 1...Bh7
      • 2.Qxf7#
  • Tries
    • 1.Sxf7?
      • 1...Ke8
        • 2.Qd8#
      • 1...Kg8
        • 2.Qh8#
      • 1...Bxf7
        • 2.Qxf7#
      • 1...Bb1
        • 2.Sd6#
      • 1...Bc2
        • 2.Sd6#
      • 1...Bd3
        • 2.Sd6#
      • 1...Be4
        • 2.Sd6#
      • 1...Bf5
        • 2.Sd6#
      • 1...Bh7
        • 2.Sd6#
      • 1...Bh5!
    • 1.Sc8?
      • threat
        • 2.Qh8#
      • 1...Ke8
        • 2.Qe7#
      • 1...Bh7
        • 2.Qxf7#
      • 1...Kg8!
    • 1.Bxf7?
      • 1...Be4+
        • 2.Bd5#
      • 1...Bxf7
        • 2.Qxf7#
      • 1...Bb1
        • 2.Ba2#
        • 2.Bb3#
        • 2.Bc4#
        • 2.Bd5#
        • 2.Be6#
      • 1...Bc2
        • 2.Ba2#
        • 2.Bb3#
        • 2.Bc4#
        • 2.Bd5#
        • 2.Be6#
      • 1...Bd3
        • 2.Ba2#
        • 2.Bb3#
        • 2.Bc4#
        • 2.Bd5#
        • 2.Be6#
      • 1...Bf5
        • 2.Ba2#
        • 2.Bb3#
        • 2.Bc4#
        • 2.Bd5#
        • 2.Be6#
      • 1...Bh7
        • 2.Ba2#
        • 2.Bb3#
        • 2.Bc4#
        • 2.Bd5#
        • 2.Be6#
      • 1...Bh5!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qd8#
        • 2.Qh8#
      • 1...Ke8
        • 2.Qe7#
      • 1...Kg8
        • 2.Qg7#
      • 1...Bxf5
        • 2.Qxf7#
      • 1...Bh7
        • 2.Qd8#
        • 2.Qxf7#

Anticipated by 245582(2002)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • B(a);N_GUARD::QAR1(C),XP(b)
    • B(a);N_GUARD,P_PINB(A)::QAR1(C),XP(b)
  • Tries
    • Try
      • S(B);XP(b)
      • Vars
        • K(c);P-FLIGHT::QAR1(C)
        • B(a);OGATE,P_SPINB(a),XS(B)::QAR1(C),XB(a)
        • B(a);N_GUARD::QAR(C)+S(B)
        • B(a);N_GUARD,P_PINB(A)::QAR(C)+S(B)
      • Refutation
        • B(a);
    • Try
      • S(B);
      • Threat
        • QAR2(C)
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR1(C)
        • B(a);N_GUARD::QAR1(C),XP(b)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • B(A);XP(b)
      • Vars
        • B(a);CHECK,N_GUARD::QAR(C)+B(A)
        • B(a);OGATE,P_SPINB(a),XB(A)::QAR1(C),XB(a)
      • Refutation
        • B(a);
  • Actual
    • S(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);N_SPINP(b),P-FLIGHT::QAR1(C)
      • K(c);P-FLIGHT::QAR1(C)
      • B(a);N_GUARD,XS(B)::QAR1(C),XP(b)
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