MESON Chess Problem Database

Problem Display
PID: 16366 (N4B2/R1pp4/2k1b2R/2p4q/2Q5/5p2/K6b/8 w - - 0 1)

Sachsel, Robert

Chess, 1940

N4B2/R1pp4/2k1b2R/2p4q/2Q5/5p2/K6b/8

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Rxc7#
    • 1...d5
      • 2.Qa4#
    • 1...d6
      • 2.Rxc7#
  • Tries
    • 1.Rxe6+?
      • 1...Bd6
        • 2.Rxc7#
      • 1...d6
        • 2.Rxc7#
      • 1...dxe6!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Ra6#
      • 1...c4
        • 2.Qb7#
      • 1...d5
        • 2.Qa4#
      • 1...d6
        • 2.Rxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::R1(D),XP(g)
    • P(h);N_PINQ(B),SBLOCK::QAB(B)
    • P(h);N_SPINB(f),S_CUTB(a)::R1(D),XP(g)
  • Tries
    • Try
      • R(C);CHECK,N_SPINQ(B),XB(f)
      • Vars
        • B(a);P_SPINB(a)::R1(D),XP(g)
        • P(h);::R1(D),XP(g)
      • Refutation
        • P(h);XR(C)
  • Actual
    • Q(B);N_PINP(c)
    • Threat
      • R(D)
    • Vars
      • P(c);N_PINQ(B)::QAB1(B)
      • P(h);N_PINQ(B),SBLOCK::QAB(B)
      • P(h);N_SPINB(f),S_CUTB(a)::R1(D),XP(g)
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