MESON Chess Problem Database

Problem Display
PID: 180932 (2N1nbb1/6p1/2R1p1B1/4k2P/2r2N2/3p4/3n3B/6QK w - - 0 1)

Preiswerk, Walther Edouard

Schweizerische Schachzeitung, 1905

2N1nbb1/6p1/2R1p1B1/4k2P/2r2N2/3p4/3n3B/6QK

#2

8 + 9

16108 Walther Preiswerks Shachprobleme (M. Henneberger) 1949

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Sd5#
    • 1...Rd4
      • 2.Qg5#
    • 1...Bh7
      • 2.Rxe6#
  • Tries
    • 1.Sxd3+?
      • 1...Kf6
        • 2.Be5#
      • 1...Kd5!
    • 1.Sxe6+?
      • 1...Kf6
        • 2.Qg5#
      • 1...Rf4
        • 2.Qd4#
        • 2.Qg5#
      • 1...Kd5!
    • 1.Qa1+?
      • 1...Rc3
        • 2.Qxc3#
      • 1...Rd4!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Sd7#
      • 1...Kf6
        • 2.Sfd5#
      • 1...Rxf4
        • 2.Qa1#
      • 1...Rxc6
        • 2.Sfd5#
      • 1...Rd4
        • 2.Qg5#
      • 1...Sf6
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(d);P_SPINP(e),S_FLIGHT::S(D)
    • R(c);SBLOCK::QAR2(A)
    • B(i);N_GUARD::R1(F),XP(e)
  • Tries
    • Try
      • S(D);CHECK,XP(b)
      • Vars
        • K(d);P_SPINP(e),S_FLIGHT::B(C)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • S(D);CHECK,XP(e)
      • Vars
        • K(d);S_FLIGHT::QAB1(A)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB(A),XR(c)
      • Refutation
        • R(c);P_SPINR(c)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • K(d);P_SPINP(e),S_FLIGHT::S(D)
      • R(c);N_GUARD,P_SPINR(c),XS(D)::QAB(A)
      • R(c);N_GUARD,XR(F)::B(C)+S(D)
      • R(c);SBLOCK::QAR2(A)
      • S(g);SBLOCK::B(C)+S(D),DCHECK,XP(b)
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