MESON Chess Problem Database

Problem Display
PID: 82299 (1QrnN3/2p5/3pp2n/rp2k3/1N1R1p2/2P2Kb1/1p1P3B/1B6 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Sinfonie Scacchistiche, 1987

1QrnN3/2p5/3pp2n/rp2k3/1N1R1p2/2P2Kb1/1p1P3B/1B6

#2

9 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Bxf4#
    • 1...Bf2
      • 2.Bxf4#
    • 1...Bh4
      • 2.Bxf4#
    • 1...Sf5
      • 2.Sd3#
      • 2.Re4#
    • 1...Sc6
      • 2.Sxc6#
    • 1...Sb7
      • 2.Sc6#
    • 1...Sf7
      • 2.Sc6#
    • 1...c5
      • 2.Qxd6#
    • 1...c6
      • 2.Qxd6#
  • Tries
    • 1.Rxf4?
      • threat
        • 2.d4#
      • 1...Bf2
        • 2.Rf5#
      • 1...Sf5
        • 2.Re4#
      • 1...c5
        • 2.Qxd6#
      • 1...Sc6!
    • 1.Qxb5+?
      • 1...d5
        • 2.Qe2#
      • 1...c5
        • 2.Qe2#
      • 1...Rxb5!
    • 1.Qb7?
      • threat
        • 2.Qe4#
      • 1...Sxb7
        • 2.Sc6#
      • 1...Sc6
        • 2.Sxc6#
      • 1...c6
        • 2.Qg7#
      • 1...d5!
  • Keys
    • 1.Rxd6!
      • threat
        • 2.d4#
      • 1...Bf2
        • 2.Bxf4#
      • 1...Sf5
        • 2.Sd3#
      • 1...Sc6
        • 2.Sxc6#
      • 1...c5
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • B(b);OGATE,P_SPINP(c)::B(C),XP(c)
    • S(l);N_GUARD::S(F),XS(l)
    • S(l);N_GUARD::S(F)
    • P(j);OGATE,P_SPINP(g)::QAB1(H),XP(g)
  • Tries
    • Try
      • R(G);XP(c)
      • Threat
        • P(B)
      • Vars
        • B(b);::B(C)+R(G),DCHECK
        • S(i);SBLOCK::R1(G)
        • P(j);OGATE,P_SPINP(g)::QAB1(H),XP(g)
      • Refutation
        • S(l);
    • Try
      • Q(H);CHECK,XP(e)
      • Vars
        • P(g);P_SPINP(g)::QAR(H)
        • P(j);P_SPINP(j)::QAR(H)
      • Refutation
        • R(d);XQ(H)
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • S(l);N_GUARD,XQ(H)::S(F)
        • S(l);N_GUARD::S(F),XS(l)
        • P(j);OGATE::QAB(H)
      • Refutation
        • P(g);
  • Actual
    • R(G);XP(g)
    • Threat
      • P(B)
    • Vars
      • B(b);OGATE,P_SPINP(c)::B(C),XP(c)
      • S(i);SBLOCK::S(F)
      • S(l);N_GUARD::S(F),XS(l)
      • P(j);::QAB(H)+R(G),DCHECK
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