MESON Chess Problem Database

Problem Display
PID: 253126 (3nK3/2pN4/q1P5/p3B2Q/Bkr5/3P4/6bR/R2N4 w - - 0 1)

Karge, Fritz

Deutsche Schachzeitung, 1983

3nK3/2pN4/q1P5/p3B2Q/Bkr5/3P4/6bR/R2N4

#2

10 + 7

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.Bxc3#
    • 1...Rf4
      • 2.Bc3#
    • 1...Rg4
      • 2.Bc3#
    • 1...Rh4
      • 2.Bc3#
    • 1...Bf1
      • 2.Rb2#
    • 1...Bh1
      • 2.Rb2#
    • 1...Bf3
      • 2.Rb2#
    • 1...Bh3
      • 2.Rb2#
    • 1...Be4
      • 2.Rb2#
    • 1...Bd5
      • 2.Rb2#
    • 1...Bxc6
      • 2.Rb2#
  • Tries
    • 1.Bd6+?
      • 1...Rc5
        • 2.Bxc5#
        • 2.Qxc5#
      • 1...cxd6!
    • 1.Rxg2?
      • threat
        • 2.Rb2#
      • 1...Rc3
        • 2.Bxc3#
      • 1...Rc2!
    • 1.Qe2?
      • threat
        • 2.Qb2#
      • 1...Rc3
        • 2.Bxc3#
      • 1...Rc2!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Bc3#
      • 1...Rd4
        • 2.Qe1#
      • 1...Re4
        • 2.Qe7#
      • 1...Be4
        • 2.Rb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • R(c);N_GUARD::B(F),XR(c)
    • R(c);N_GUARD::B(F)
    • B(a);OGATE::R(C)
    • B(a);OGATE,P_PINS(I),XP(H)::R(C)
  • Tries
    • Try
      • B(F);CHECK
      • Refutation
        • P(f);XB(F)
    • Try
      • R(C);XB(a)
      • Threat
        • R(C)
      • Vars
        • R(c);N_GUARD::B(F),XR(c)
      • Refutation
        • R(c);
    • Try
      • Q(G);
      • Threat
        • QAR2(G)
      • Vars
        • R(c);N_GUARD::B(F),XR(c)
      • Refutation
        • R(c);
  • Actual
    • Q(G);P_PINR(c)
    • Threat
      • B(F)
    • Vars
      • R(c);N_GUARD::QAB(G)
      • R(c);N_GUARD,P_PINB(F)::QAB(G)
      • B(a);N_SPINR(c),OGATE::R(C)
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