MESON Chess Problem Database

Problem Display
PID: 198122 (2q5/n3bN2/8/P1k3r1/R1PNB3/KR6/8/B7 w - - 0 1)

Letzen, Einar

Deutsche Schachzeitung, 1920

2q5/n3bN2/8/P1k3r1/R1PNB3/KR6/8/B7

#2

9 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Sxe6#
    • 1...Qb7
      • 2.Se6#
    • 1...Qc7
      • 2.Se6#
    • 1...Qa8
      • 2.Se6#
    • 1...Qb8
      • 2.Se6#
    • 1...Qd8
      • 2.Se6#
    • 1...Qe8
      • 2.Se6#
    • 1...Qf8
      • 2.Se6#
    • 1...Qg8
      • 2.Se6#
    • 1...Qh8
      • 2.Se6#
    • 1...Sb5+
      • 2.Rxb5#
    • 1...Sc6
      • 2.Rb5#
  • Keys
    • 1.Rc3!
      • threat
        • 2.Sb3#
      • 1...Kxd4+
        • 2.c5#
      • 1...Sb5+
        • 2.cxb5#
      • 1...Qb7
        • 2.Se6#
      • 1...Qb8
        • 2.Se6#
      • 1...Rd5
        • 2.cxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • Q(e);N_GUARD::S(F),XQ(e)
    • Q(e);N_GUARD::S(F)
    • S(c);CHECK,N_GUARD::R1(C),XS(c)
    • S(c);N_GUARD::R1(C)
  • Actual
    • R(C);
    • Threat
      • S(F)
    • Vars
      • K(a);CHECK,OGATE,S_FLIGHT,XS(F)::R(D)+P(E)
      • S(c);CHECK,OGATE::R(C)+P(E),XS(c)
      • Q(e);N_GUARD::S(F)
      • R(b);OGATE::R(C)+P(E),XR(b)
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