MESON Chess Problem Database

Problem Display
PID: 249527 (7Q/2p3r1/R7/1R2Bp2/4k3/2PNn3/b1N1P3/2K3b1 w - - 0 1)

van Atten, Jasper

Schakend Nederland, 1979

7Q/2p3r1/R7/1R2Bp2/4k3/2PNn3/b1N1P3/2K3b1

#2

9 + 7

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Sxf2#
    • 1...Bh2
      • 2.Sf2#
    • 1...Sg4
      • 2.Qh1#
  • Tries
    • 1.Bg3?
      • threat
        • 2.Re5#
      • 1...Re7
        • 2.Qd4#
      • 1...Bd5
        • 2.Sc5#
      • 1...Sc4
        • 2.Qh1#
      • 1...Sg4
        • 2.Qh1#
      • 1...Sd5
        • 2.Re6#
        • 2.Qh1#
      • 1...c5!
    • 1.Qh4+?
      • 1...Sg4
        • 2.Qh1#
      • 1...f4
        • 2.Qxf4#
      • 1...Rg4!
  • Keys
    • 1.Bxc7!
      • threat
        • 2.Re5#
      • 1...Re7
        • 2.Qd4#
      • 1...Bh2
        • 2.Sf2#
      • 1...Bd5
        • 2.Sc5#
      • 1...Sc4
        • 2.Qa8#
      • 1...Sg4
        • 2.Qh1#
      • 1...Sd5
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::S(E),XB(a)
    • B(a);N_GUARD::S(E)
    • S(c);N_GUARD,S_CUTR(g)::QAB(I)
  • Tries
    • Try
      • B(G);
      • Threat
        • R1(F)
      • Vars
        • R(g);OGATE::QAR1(I)
        • B(b);SBLOCK::S(E)
        • S(c);N_GUARD::QAB(I)
      • Refutation
        • P(f);
    • Try
      • Q(I);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c),S_CUTR(g)::QAB(I)
        • P(e);P_SPINP(e)::QAR1(I),XP(e)
      • Refutation
        • R(g);P_SPINR(g)
  • Actual
    • B(G);XP(f)
    • Threat
      • R1(F)
    • Vars
      • R(g);OGATE::QAR1(I)
      • B(a);N_GUARD::S(E)
      • B(b);SBLOCK::S(E)
      • S(c);N_GUARD,S_CUTB(b)::QAB(I)
      • S(c);N_GUARD,S_CUTR(g)::QAB(I)
      • S(c);S_CUTB(b)::R(H)
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