MESON Chess Problem Database

Problem Display
PID: 52639 (2q5/1B3r2/2R5/2p1p1B1/2pbk2p/1p2N3/7N/1K1Q4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

3rd HM., Het Belgisch Schaakbord (L'Echiquier Belge), 1988-1989

2q5/1B3r2/2R5/2p1p1B1/2pbk2p/1p2N3/7N/1K1Q4

#2

7 + 9

5110 Bekroonde Problemen 2002
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3
      • 2.Rc7#
    • 1...Qg4
      • 2.Rc7#
    • 1...Qf5
      • 2.Rc7#
    • 1...Qxc6
      • 2.Bxc6#
    • 1...Qc7
      • 2.Rxc7#
    • 1...Qf8
      • 2.Rc7#
    • 1...Qg8
      • 2.Rc7#
    • 1...Qh8
      • 2.Rc7#
    • 1...Rf1
      • 2.Rxc8#
    • 1...Rf2
      • 2.Rxc8#
    • 1...Rf3
      • 2.Rxc8#
    • 1...Rf5
      • 2.Rxc8#
    • 1...Rf8
      • 2.Rxc8#
    • 1...Ba1
      • 2.Qd5#
    • 1...Bb2
      • 2.Qd5#
    • 1...Bc3
      • 2.Qd5#
    • 1...b2
      • 2.Qc2#
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qf3#
      • 1...Kd5
        • 2.Rd6#
      • 1...Kxf5
        • 2.Qg4#
      • 1...Qxf5
        • 2.Rc7#
      • 1...Rxf5
        • 2.Rxc8#
      • 1...Be3
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 15
  • Sets
    • Q(i);N_GUARD::B(G)+R(F)
    • Q(i);OGATE,P_SPINQ(i),XR(F)::B(G),XQ(i)
    • Q(i);N_GUARD::B(G)+R(F),XQ(i)
    • R(h);N_GUARD,P_PINQ(B)::B(G)+R(F),XQ(i)
    • R(h);N_GUARD::B(G)+R(F),XQ(i)
    • B(c);OGATE::QAB1(B)
    • P(a);N_GUARD::QAB(B)
  • Actual
    • S(D);
    • Threat
      • QAB1(B)
    • Vars
      • K(d);P_SPINB(c),S_FLIGHT::B(G)+R(F),DCHECK
      • K(d);S_FLIGHT,XS(D)::QAB1(B)
      • Q(i);N_GUARD,SBLOCK,XS(D)::B(G)+R(F)
      • R(h);N_GUARD,SBLOCK,XS(D)::B(G)+R(F),XQ(i)
      • B(c);::S(D)
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