MESON Chess Problem Database

Problem Display
PID: 189455 (8/8/3QR3/8/8/7p/2pNpN1p/2n1k2K w - - 0 1)

Gross, Otto

Mannheimer Schachzeitung, 1911

8/8/3QR3/8/8/7p/2pNpN1p/2n1k2K

#2

5 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Qe5?
      • 1...Kxd2
        • 2.Qa5#
      • 1...Sa2
        • 2.Qxe2#
      • 1...Sb3
        • 2.Qxe2#
      • 1...Sd3
        • 2.Qxe2#
      • 1...Kxf2!
  • Keys
    • 1.Qe7!
      • 1...Kxd2
        • 2.Qb4#
      • 1...Kxf2
        • 2.Qh4#
      • 1...Sa2
        • 2.Rxe2#
      • 1...Sb3
        • 2.Rxe2#
      • 1...Sd3
        • 2.Rxe2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);
      • Vars
        • K(b);N_SPINP(d),OGATEB,S_FLIGHT,XS(B)::QAB(D)
        • S(a);N_GUARD::QAR1(D),XP(d)
      • Refutation
        • K(b);N_SPINP(d),S_FLIGHT,XS(C)
  • Actual
    • Q(D);
    • Vars
      • K(b);N_SPINP(d),OGATEB,S_FLIGHT,XS(B)::QAB(D)
      • K(b);N_SPINP(d),OGATEB,S_FLIGHT,XS(C)::QAB(D)
      • S(a);N_GUARD::R1(E),XP(d)
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