MESON Chess Problem Database

Problem Display
PID: 261466 (1b2nr2/6p1/pp1BR3/qp1p1pK1/r2k1NP1/p3N2Q/n1R2P2/8 w - - 0 1)

Schaffner, Gerold

Neue Zurcher Zeitung, 2005

1b2nr2/6p1/pp1BR3/qp1p1pK1/r2k1NP1/p3N2Q/n1R2P2/8

#2

9 + 14

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rg8
      • 2.Sxf5#
    • 1...Rh8
      • 2.Sxf5#
    • 1...Sc3
      • 2.Rd2#
    • 1...Sf6
      • 2.Sxf5#
  • Tries
    • 1.Be5+?
      • 1...Ke4
        • 2.Qg2#
        • 2.Qh1#
      • 1...Bxe5!
    • 1.Rc4+?
      • 1...bxc4
        • 2.Sc2#
      • 1...dxc4
        • 2.Sc2#
      • 1...Rxc4!
    • 1.Qf3?
      • threat
        • 2.Qxd5#
      • 1...Sc3
        • 2.Rd2#
      • 1...Sf6
        • 2.Sxf5#
      • 1...Sc7
        • 2.Be5#
      • 1...b4
        • 2.Qd1#
      • 1...Sb4!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qxd5#
      • 1...Sc3
        • 2.Rd2#
      • 1...Sb4
        • 2.Qa1#
      • 1...Sf6
        • 2.Sxf5#
      • 1...Sc7
        • 2.Be5#
      • 1...b4
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(n);N_GUARD::S(C),XP(h)
    • S(a);SBLOCK,S_CUTQ(e)::R(A)
    • S(m);S_CUTR(n)::S(C),XP(h)
  • Tries
    • Try
      • B(H);CHECK
      • Refutation
        • B(l);XB(H)
    • Try
      • R(A);CHECK
      • Vars
        • P(f);SBLOCK,XR(A)::S(C)
        • P(g);SBLOCK,XR(A)::S(C)
      • Refutation
        • R(c);XR(A)
    • Try
      • Q(D);
      • Threat
        • QAR1(D),XP(g)
      • Vars
        • S(a);SBLOCK,S_CUTQ(e)::R(A)
        • S(m);S_CUTR(n)::S(C),XP(h)
        • S(m);S_CUTB(l)::B(H)
        • P(f);S_CUTQ(e)::QAR(D)
      • Refutation
        • S(a);
  • Actual
    • Q(D);
    • Threat
      • QAR1(D),XP(g)
    • Vars
      • S(a);SBLOCK,S_CUTQ(e)::R(A)
      • S(a);N_GUARD,S_CUTQ(e)::QAB(D)
      • S(m);S_CUTR(n)::S(C),XP(h)
      • S(m);S_CUTB(l)::B(H)
      • P(f);S_CUTQ(e)::QAR(D)
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