MESON Chess Problem Database

Problem Display
PID: 158389 (8/8/8/n7/8/1N2Q3/3NPK2/2bk4 w - - 0 1)

Schumer, Jacob

British Chess Magazine 13. Ty., 1906-1907

8/8/8/n7/8/1N2Q3/3NPK2/2bk4

#2

5 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd2
      • 2.Qxd2#
  • Tries
    • 1.Sf1?
      • threat
        • 2.Qxc1#
      • 1...Bxe3+
        • 2.Sxe3#
      • 1...Sxb3
        • 2.Qxb3#
      • 1...Bb2
        • 2.Qd2#
        • 2.Qd3#
      • 1...Bd2
        • 2.Qxd2#
      • 1...Ba3
        • 2.Qd2#
        • 2.Qd3#
      • 1...Kc2!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Qxc1#
      • 1...Bxe3+
        • 2.Sxe3#
      • 1...Kc2
        • 2.Qd3#
      • 1...Sxb3
        • 2.Qxb3#
      • 1...Bb2
        • 2.Qd2#
        • 2.Qd3#
      • 1...Bd2
        • 2.Qxd2#
      • 1...Ba3
        • 2.Qd2#
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(a);OGATE,XS(A)::QAR1(E),XB(a)
  • Tries
    • Try
      • S(A);
      • Threat
        • QAR1(E),XB(a)
      • Vars
        • B(a);CHECK,XQ(E)::S(A),XB(a)
        • S(c);OGATE,XS(D)::QAB(E),XS(c)
        • B(a);N_GUARD::QAR1(E),XB(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(A);
    • Threat
      • QAR1(E),XB(a)
    • Vars
      • B(a);CHECK,XQ(E)::S(A),XB(a)
      • K(b);S_FLIGHT::QAB1(E)
      • S(c);OGATE,XS(D)::QAB(E),XS(c)
      • B(a);N_GUARD::QAR1(E),XB(a)
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