MESON Chess Problem Database

Problem Display
PID: 273161 (b5K1/3Q4/1N1PpP2/1p2k3/1N3n2/B1P5/8/1B1R1R2 w - - 0 1)

Ekstrom, Sven Johan Adrian

Schackvarlden, 1941

b5K1/3Q4/1N1PpP2/1p2k3/1N3n2/B1P5/8/1B1R1R2

#2

11 + 5

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf6
      • 2.Qg7#
  • Tries
    • 1.Sc6+?
      • 1...Kxf6
        • 2.Qe7#
        • 2.Qg7#
        • 2.Qd8#
      • 1...Bxc6!
    • 1.Sc4+?
      • 1...Kxf6
        • 2.Qe7#
        • 2.Qg7#
        • 2.Qd8#
      • 1...bxc4!
    • 1.Sxa8?
      • 1...Kxf6
        • 2.Qg7#
      • 1...Se2
        • 2.Sc6#
        • 2.Qxb5#
      • 1...Sg2
        • 2.Sc6#
        • 2.Qxb5#
      • 1...Sh3
        • 2.Sc6#
        • 2.Rde1#
        • 2.Qxb5#
      • 1...Sd5
        • 2.Sc6#
      • 1...Sh5
        • 2.Sc6#
        • 2.Rde1#
        • 2.Qxb5#
      • 1...Sg6
        • 2.Sc6#
        • 2.Rde1#
        • 2.Qxb5#
      • 1...Sd3!
    • 1.Qxb5+?
      • 1...Kxf6
        • 2.Sd7#
        • 2.Rxf4#
      • 1...Sd5
        • 2.Sc4#
      • 1...Bd5!
    • 1.Qxe6+?
      • 1...Sxe6
        • 2.Sd7#
        • 2.Rf5#
      • 1...Kxe6!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Sd7#
      • 1...Kxf6
        • 2.Qg7#
      • 1...Sd3
        • 2.Sxd3#
      • 1...Sd5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);OGATEB,P_SPINS(a),S_FLIGHT,XP(I)::QAB1(J)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • B(e);XS(F)
    • Try
      • S(G);CHECK
      • Refutation
        • P(b);XS(G)
    • Try
      • S(G);XB(e)
      • Vars
        • K(c);OGATEB,P_SPINS(a),S_FLIGHT,XP(I)::QAB1(J)
        • S(a);::S(F)
      • Refutation
        • S(a);
    • Try
      • Q(J);CHECK,XP(b)
      • Vars
        • S(a);P_SPINS(a)::S(G)
      • Refutation
        • B(e);P_SPINB(e)
    • Try
      • Q(J);CHECK,XP(d)
      • Refutation
        • K(c);P-FLIGHT,XQ(J)
  • Actual
    • Q(J);
    • Threat
      • S(G)
    • Vars
      • K(c);OGATEB,P_SPINS(a),S_FLIGHT,XP(I)::QAB1(J)
      • S(a);N_GUARD::S(F),XS(a)
      • S(a);::S(F)
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