MESON Chess Problem Database

Problem Display
PID: 222450 (1QBn4/7N/8/4N3/2R1pk2/8/5B2/7K w - - 0 1)

Teed, Frank Melville

Brooklyn Chess Chronicle, 1884

1QBn4/7N/8/4N3/2R1pk2/8/5B2/7K

#2

7 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Kg2?
      • threat
        • 2.Sd3#
        • 2.Sf3#
        • 2.Sg4#
        • 2.Sc6#
        • 2.Sg6#
        • 2.Sf7#
      • 1...Sc6
        • 2.Sd3#
        • 2.Sxc6#
        • 2.Sg6#
      • 1...Sb7
        • 2.Sd3#
        • 2.Sg6#
      • 1...Sf7
        • 2.Sd3#
        • 2.Sg6#
        • 2.Sxf7#
      • 1...Se6!
    • 1.Rc3?
      • threat
        • 2.Sf3#
        • 2.Sc4#
        • 2.Sg4#
        • 2.Sc6#
        • 2.Sg6#
        • 2.Sf7#
        • 2.Bg3#
      • 1...e3
        • 2.Rc4#
      • 1...Sc6
        • 2.Sxc6#
        • 2.Sg6#
        • 2.Bg3#
      • 1...Sb7
        • 2.Sg6#
        • 2.Bg3#
      • 1...Sf7
        • 2.Sg6#
        • 2.Sxf7#
        • 2.Bg3#
      • 1...Se6!
    • 1.Qb1?
      • threat
        • 2.Rxe4#
        • 2.Qxe4#
      • 1...Se6
        • 2.Qxe4#
      • 1...Kxe5!
  • Keys
    • 1.Rc7!
      • 1...Kxe5
        • 2.Rc5#
      • 1...Se6
        • 2.Rf7#
      • 1...e3
        • 2.Rc4#
      • 1...Sc6
        • 2.Rf7#
      • 1...Sb7
        • 2.Rf7#
      • 1...Sf7
        • 2.Rxf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • DUALS(6)
      • Refutation
        • S(c);
    • Try
      • R(C);N_PINP(a)
      • Threat
        • DUALS(7)
      • Vars
        • P(a);OGATEB::R(C)
      • Refutation
        • S(c);
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);::QAR1(F),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT,XS(D)
  • Actual
    • R(C);N_PINP(a)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XS(D)::QAB(F)+R(C),DCHECK
      • S(c);N_GUARD::R(C)
      • P(a);OGATEB::R(C)
      • S(c);N_GUARD::R(C),XS(c)
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