MESON Chess Problem Database

Problem Display
PID: 91872 (n7/pN1R2K1/pk5P/8/p3B3/p1N3p1/1q5r/1Q5R w - - 0 1)

Ferreau, Wilhelm

Deutsche Schachblatter, 1936

n7/pN1R2K1/pk5P/8/p3B3/p1N3p1/1q5r/1Q5R

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Qxb4#
    • 1...Qb5
      • 2.Sxa4#
    • 1...Rxh6
      • 2.Rxh6#
    • 1...Sc7
      • 2.Rd6#
  • Keys
    • 1.Bg2!
      • threat
        • 2.Qg6#
      • 1...Qxb1
        • 2.Rxb1#
      • 1...Rxh6
        • 2.Rxh6#
      • 1...Qb3
        • 2.Qg1#
      • 1...Qb4
        • 2.Qxb4#
      • 1...Qb5
        • 2.Sxa4#
      • 1...Sc7
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(a);N_PINS(C),OGATE::QAR2(A),XQ(a)
    • Q(a);N_PINS(C)::S(C),XP(e)
    • R(b);OGATE,XP(E)::R(B),XR(b)
    • S(i);SBLOCK::R(G)
  • Actual
    • B(D);
    • Threat
      • QAR(A)
    • Vars
      • Q(a);N_PINS(C),N_SPINQ(a),OGATE,XQ(A)::R(B),XQ(a)
      • R(b);OGATE,XP(E)::R(B),XR(b)
      • Q(a);N_GUARD,N_PINS(C)::QAB(A)
      • Q(a);N_PINS(C),OGATE::QAR2(A),XQ(a)
      • Q(a);N_PINS(C)::S(C),XP(e)
      • S(i);SBLOCK::R(G)
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