MESON Chess Problem Database

Problem Display
PID: 133940 (7B/3Q3K/5p2/3p4/4k1N1/6PP/4PP2/4n3 w - - 0 1)

Sikdar, Niharendu

The Field, 1962

(First published on Thu Oct 25 1962)

7B/3Q3K/5p2/3p4/4k1N1/6PP/4PP2/4n3

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Qe6#
    • 1...f5
      • 2.Qe6#
      • 2.Qe8#
      • 2.Qe7#
  • Tries
    • 1.Se3?
      • threat
        • 2.Qxd5#
      • 1...Ke5
        • 2.Qxd5#
      • 1...d4
        • 2.Qf5#
        • 2.Qe6#
        • 2.Qe8#
        • 2.Qd5#
        • 2.Qe7#
      • 1...Kd4!
    • 1.Sxf6+?
      • 1...Ke5
        • 2.Qxd5#
      • 1...Kd4!
    • 1.Bxf6?
      • threat
        • 2.Qe6#
      • 1...Sd3
        • 2.f3#
      • 1...Sf3!
    • 1.Qe7+?
      • 1...Kd4
        • 2.Qb4#
      • 1...Kf5!
  • Keys
    • 1.Qb5!
      • 1...Kd4
        • 2.Qb4#
      • 1...Kf5
        • 2.Qxd5#
      • 1...Sc2
        • 2.Qd3#
      • 1...Sg2
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sf3
        • 2.Qd3#
      • 1...d4
        • 2.Sxf6#
      • 1...f5
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAR2(F)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB1(F),XP(c)
      • Vars
        • K(b);P-FLIGHT,P_SPINP(d)::QAR1(F),XP(c)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(c)
    • Try
      • S(E);CHECK,XP(d)
      • Vars
        • K(b);P-FLIGHT::QAR1(F),XP(c)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(c)
    • Try
      • B(H);XP(d)
      • Threat
        • QAR2(F)
      • Vars
        • S(a);N_GUARD::P(B)
      • Refutation
        • S(a);
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(d)::QAR2(F)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(b);P-FLIGHT,P_SPINP(d)::QAR2(F)
      • K(b);P_SPINP(c),S_FLIGHT::QAR2(F),XP(c)
      • S(a);N_GUARD::QAB1(F)
      • S(a);N_GUARD::QAB1(F),XS(a)
      • P(c);SBLOCK::S(E),XP(d)
      • P(d);SBLOCK::QAR(F)
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