MESON Chess Problem Database

Problem Display
PID: 254968 (3N4/4p3/p3N1K1/3pkp2/4P2p/8/8/1Q6 w - - 0 1)

Lukashev, Viktor Sergeevich

Zadachi i Etyudi, 2006

3N4/4p3/p3N1K1/3pkp2/4P2p/8/8/1Q6

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...fxe4
      • 2.Qb8#
  • Tries
    • 1.Qd3?
      • threat
        • 2.Qxd5#
      • 1...Kd6
        • 2.Qxd5#
      • 1...dxe4
        • 2.Qd4#
      • 1...d4
        • 2.Qxd4#
      • 1...fxe4!
    • 1.Qc1?
      • threat
        • 2.Qf4#
      • 1...Kd6
        • 2.Qc7#
      • 1...dxe4
        • 2.Qc5#
      • 1...f4
        • 2.Qxf4#
      • 1...Kxe4!
    • 1.Qd1?
      • threat
        • 2.Qxd5#
      • 1...Kxe4
        • 2.Qe2#
      • 1...Kd6
        • 2.Qxd5#
      • 1...dxe4
        • 2.Qd4#
      • 1...d4
        • 2.Qxd4#
      • 1...fxe4!
    • 1.Qb2+?
      • 1...Kxe4
        • 2.Qe2#
      • 1...d4
        • 2.Qxd4#
      • 1...Kd6!
    • 1.Qb3?
      • threat
        • 2.Qxd5#
      • 1...Kd6
        • 2.Qxd5#
      • 1...dxe4
        • 2.Sf7#
      • 1...fxe4
        • 2.Qb8#
      • 1...d4
        • 2.Qd5#
      • 1...Kxe4!
    • 1.Qb5?
      • threat
        • 2.Qxd5#
      • 1...Kxe4
        • 2.Qe2#
      • 1...Kd6
        • 2.Qxd5#
      • 1...fxe4
        • 2.Qb8#
      • 1...axb5!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qxd5#
      • 1...Kxe4
        • 2.Qe2#
      • 1...Kd6
        • 2.Qxd5#
      • 1...dxe4
        • 2.Sf7#
      • 1...fxe4
        • 2.Qh2#
      • 1...d4
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(d);SBLOCK,XP(B)::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(b)
      • Vars
        • K(c);P_SPINP(b),S_FLIGHT::QAR1(A),XP(b)
        • P(b);XP(B)::QAB1(A)
        • P(b);::QAB1(A),XP(b)
      • Refutation
        • P(d);XP(B)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);N_GUARD,S_FLIGHT::QAB1(A)
        • P(b);OGATEB,SBLOCK,XP(B)::QAR2(A)
        • P(d);::QAB1(A),XP(d)
      • Refutation
        • K(c);P-FLIGHT,XP(B)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(b)
      • Vars
        • K(c);OGATEB,P-FLIGHT,XP(B)::QAR2(A)
        • K(c);P_SPINP(b),S_FLIGHT::QAR1(A),XP(b)
        • P(b);XP(B)::QAB1(A)
        • P(b);::QAB1(A),XP(b)
      • Refutation
        • P(d);XP(B)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATEB,P-FLIGHT,XP(B)::QAR2(A)
        • P(b);P_SPINP(b)::QAB1(A),XP(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(b)
      • Vars
        • K(c);S_FLIGHT::QAR1(A),XP(b)
        • P(b);SBLOCK,XP(B)::S(E)
        • P(d);SBLOCK,XP(B)::QAB(A)
        • P(b);::QAR1(A)
      • Refutation
        • K(c);P-FLIGHT,XP(B)
    • Try
      • Q(A);P_PINP(b)
      • Threat
        • QAR1(A),XP(b)
      • Vars
        • K(c);N_SPINP(b),OGATEB,P-FLIGHT,XP(B)::QAR2(A)
        • K(c);N_SPINP(b),S_FLIGHT::QAR1(A),XP(b)
        • P(d);SBLOCK,XP(B)::QAB(A)
      • Refutation
        • P(e);N_SPINP(b),XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(b)
    • Vars
      • K(c);OGATEB,P-FLIGHT,XP(B)::QAR2(A)
      • K(c);S_FLIGHT::QAR1(A),XP(b)
      • P(b);SBLOCK,XP(B)::S(E)
      • P(d);N_GUARD,SBLOCK,XP(B)::QAB(A)
      • P(b);::QAR1(A)
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