MESON Chess Problem Database

Problem Display
PID: 160961 (2R4B/bP3p2/2B5/1pP2K2/1pk1p1Q1/1N4R1/P1q1P1P1/8 w - - 0 1)

Albrecht, Hermann

Averbacher Zeitung, 1938

(First published on Sat Oct 1 1938)

2R4B/bP3p2/2B5/1pP2K2/1pk1p1Q1/1N4R1/P1q1P1P1/8

#2

12 + 7

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.exd3#
    • 1...Qc1
      • 2.Qxe4#
    • 1...Qxa2
      • 2.Qxe4#
    • 1...Qxe2
      • 2.Qxe2#
    • 1...Bxc5
      • 2.Sa5#
    • 1...f6
      • 2.Qg8#
  • Tries
    • 1.Bxb5+?
      • 1...Kd5
        • 2.Rd8#
      • 1...Kxb5!
  • Keys
    • 1.Bxe4!
      • threat
        • 2.Sa5#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...Qxb3
        • 2.Bf3#
        • 2.axb3#
      • 1...Qxa2
        • 2.Bc6#
      • 1...Bb6
        • 2.cxb6#
      • 1...f6
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(a);OGATE::P(B),XQ(a)
    • Q(a);N_GUARD::QAR2(F),XP(d)
    • Q(a);N_GUARD,XP(A)::QAR2(F),XP(d)
    • Q(a);OGATE,XP(B)::QAB(F),XQ(a)
    • B(f);SBLOCK,XP(G)::S(D)
    • P(g);OGATEB::QAB(F)
  • Tries
    • Try
      • B(I);CHECK,XP(e)
      • Vars
        • K(c);N_SPINP(d),S_FLIGHT::R(K)
      • Refutation
        • K(c);N_SPINP(d),S_FLIGHT,XB(I)
  • Actual
    • B(I);P_SPINB(I),XP(d)
    • Threat
      • S(D)
    • Vars
      • Q(a);CHECK,OGATE,P_SPINQ(a),XB(I)::QAR2(F),XQ(a)
      • Q(a);N_PINB(I),XP(A)::QAR(F)+B(I)
      • B(f);OGATE::R(K)+P(G),XB(f)
      • P(g);OGATEB::QAB(F)
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