MESON Chess Problem Database

Problem Display
PID: 156935 (N7/1Q6/4b3/2k5/2Nr4/1P6/3P4/2K3B1 w - - 0 1)

Akerblom, Johan Axel

Arbeiter Schach Internationale, 1925

N7/1Q6/4b3/2k5/2Nr4/1P6/3P4/2K3B1

#2

7 + 3

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Qb6#
  • Tries
    • 1.Sab6?
      • threat
        • 2.Sa4#
      • 1...Kb4
        • 2.Sa4#
        • 2.Sd7#
      • 1...Kb5
        • 2.Sa4#
        • 2.Sd7#
      • 1...Bd7
        • 2.Sxd7#
      • 1...Bxc4!
    • 1.Sc7?
      • threat
        • 2.Sa6#
        • 2.Sxe6#
        • 2.Qb5#
        • 2.Qb6#
      • 1...Bh3
        • 2.Sa6#
        • 2.Qb5#
        • 2.Qb6#
      • 1...Bg4
        • 2.Sa6#
        • 2.Qb5#
        • 2.Qb6#
      • 1...Bd5
        • 2.Sa6#
        • 2.Qb5#
        • 2.Qb6#
      • 1...Bf5
        • 2.Sa6#
        • 2.Qb5#
        • 2.Qb6#
      • 1...Bd7
        • 2.Sa6#
        • 2.Qb6#
      • 1...Bf7
        • 2.Sa6#
        • 2.Qb5#
        • 2.Qb6#
      • 1...Bc8
        • 2.Sa6#
        • 2.Qb5#
        • 2.Qb6#
      • 1...Bg8
        • 2.Sa6#
        • 2.Qb5#
        • 2.Qb6#
      • 1...Bxc4!
    • 1.Qc6+?
      • 1...Kb4
        • 2.Qb6#
      • 1...Kxc6!
    • 1.Qc7+?
      • 1...Kb4
        • 2.Qb6#
      • 1...Kb5
        • 2.Qb6#
      • 1...Kd5!
  • Keys
    • 1.Se3!
      • threat
        • 2.Qb6#
      • 1...Rc4+
        • 2.Sxc4#
      • 1...Kd6
        • 2.Qc7#
      • 1...Rb4
        • 2.Sc4#
      • 1...Rd6
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(c);SBLOCK::QAB1(F)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • B(c);N_GUARD::S(G),XB(c)
      • Refutation
        • B(c);XS(E)
    • Try
      • S(G);
      • Threat
        • DUALS(4)
      • Refutation
        • B(c);XS(E)
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);N_SPINR(a),S_FLIGHT::QAR2(F)
      • Refutation
        • K(b);N_SPINR(a),P-FLIGHT,XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);N_SPINR(a),S_FLIGHT::QAR2(F)
        • K(b);N_SPINR(a),P-FLIGHT::QAR1(F)
      • Refutation
        • K(b);N_SPINR(a),P-FLIGHT
  • Actual
    • S(E);N_PINR(a)
    • Threat
      • QAB1(F)
    • Vars
      • R(a);CHECK::B(B)+S(E),XR(a)
      • K(b);S_FLIGHT::QAB1(F)
      • R(a);::B(B)+S(E)
      • R(a);SBLOCK::B(B)+S(E)
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