MESON Chess Problem Database

Problem Display
PID: 238675 (2n2R1R/8/4bPkp/8/2pK3B/3pN1p1/4Q3/1B6 w - - 0 1)

Ahues, Herbert Siegfried Oskar

idee & form, 1992

2n2R1R/8/4bPkp/8/2pK3B/3pN1p1/4Q3/1B6

#2

8 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bg4
      • 2.Qxg4#
    • 1...Bd5
      • 2.Qg4#
    • 1...Bf7
      • 2.Qg4#
    • 1...Bg8
      • 2.Qg4#
    • 1...h5
      • 2.Qxh5#
  • Tries
    • 1.Bxd3+?
      • 1...Bf5
        • 2.Bxf5#
        • 2.Qg4#
      • 1...cxd3!
    • 1.Rf7?
      • threat
        • 2.Rg7#
      • 1...Kxf7
        • 2.Qh5#
      • 1...Bxf7
        • 2.Qg4#
      • 1...Bg4!
    • 1.Rfg8+?
      • 1...Kf7
        • 2.Rg7#
        • 2.Qh5#
      • 1...Bxg8!
    • 1.Rhg8+?
      • 1...Kh7
        • 2.Rg7#
      • 1...Bxg8!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qg4#
      • 1...Kxf5
        • 2.Qe4#
      • 1...Bxf5
        • 2.Qe8#
      • 1...dxe2
        • 2.Rxh6#
      • 1...h5
        • 2.Qxh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(d);N_GUARD::QAR2(B),XB(d)
    • B(d);N_GUARD::QAR2(B)
    • P(f);::QAB1(B),XP(f)
  • Tries
    • Try
      • B(A);CHECK,XP(a)
      • Refutation
        • P(c);XB(A)
    • Try
      • R(G);
      • Threat
        • R1(G)
      • Vars
        • K(e);N_SPINP(a),S_FLIGHT,XR(G)::QAB(B)
        • B(d);N_GUARD,SBLOCK,XR(G)::QAR2(B)
      • Refutation
        • B(d);
    • Try
      • R(G);CHECK
      • Refutation
        • B(d);XR(G)
    • Try
      • R(H);CHECK
      • Vars
        • K(e);S_FLIGHT::R1(H)
      • Refutation
        • B(d);XR(H)
  • Actual
    • S(C);N_PINP(a)
    • Threat
      • QAR2(B)
    • Vars
      • K(e);OGATEB,P_SPINP(a),S_FLIGHT,XS(C)::QAB1(B)
      • B(d);OGATE,SBLOCK,XS(C)::QAB(B)
      • P(a);XQ(B)::R1(H),XP(f)
      • P(f);::QAB1(B),XP(f)
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