MESON Chess Problem Database

Problem Display
PID: 160921 (1R6/4p2K/2B4Q/2k1pN2/npr5/nPr5/5P2/2R3B1 w - - 0 1)

Albrecht, Hermann

Welt im Bild, 1937

(First published on Sun Jan 24 1937)

1R6/4p2K/2B4Q/2k1pN2/npr5/nPr5/5P2/2R3B1

#2

9 + 8

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3
      • 2.fxg3#
    • 1...Rh3
      • 2.f3#
    • 1...Rh4
      • 2.f4#
    • 1...Sb1
      • 2.Rb5#
    • 1...Sc2
      • 2.Rb5#
    • 1...Sb5
      • 2.Rxb5#
  • Tries
    • 1.Be4?
      • threat
        • 2.Qc6#
      • 1...Rh3
        • 2.f3#
      • 1...e6
        • 2.Qf8#
      • 1...Rxe4!
    • 1.f3+?
      • 1...Re3
        • 2.Bxe3#
      • 1...Rd4!
    • 1.f4+?
      • 1...Re3
        • 2.Bxe3#
      • 1...Rd4!
  • Keys
    • 1.Ba8!
      • threat
        • 2.Qc6#
      • 1...Rh3
        • 2.f3#
      • 1...Rh4
        • 2.f4#
      • 1...e6
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(b);OGATE,P_SPINR(e)::B(B)+P(C),XR(b)
    • R(b);N_GUARD,P_PINQ(G),P_SPINR(e)::B(B)+P(C)
    • R(e);N_GUARD,P_PINQ(G),P_SPINR(b)::B(B)+P(C)
    • S(a);N_GUARD::R1(I)
    • S(a);N_GUARD::R1(I),XS(a)
  • Tries
    • Try
      • B(F);
      • Threat
        • QAR1(G)
      • Vars
        • R(b);N_GUARD,P_PINQ(G),P_SPINR(e)::B(B)+P(C)
        • P(h);OGATEB::QAB(G)
      • Refutation
        • R(e);P_SPINR(b),XB(F)
    • Try
      • P(C);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b),S_CUTR(e)::B(B),XR(b)
      • Refutation
        • R(e);P_SPINR(b)
    • Try
      • P(C);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b),S_CUTR(e)::B(B),XR(b)
      • Refutation
        • R(e);P_SPINR(b)
  • Actual
    • B(F);
    • Threat
      • QAR1(G)
    • Vars
      • R(b);N_GUARD,P_PINQ(G),P_SPINR(e)::B(B)+P(C)
      • R(e);N_GUARD,P_PINQ(G),P_SPINR(b)::B(B)+P(C)
      • P(h);OGATEB::QAB(G)
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