MESON Chess Problem Database

Problem Display
PID: 261359 (5n1B/2rbQ3/4p3/pp1NP3/3k4/N3p3/1P2P2K/7B w - - 0 1)

Jaeger, Peter R

Neue Zurcher Zeitung, 1989

5n1B/2rbQ3/4p3/pp1NP3/3k4/N3p3/1P2P2K/7B

#2

9 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.bxc3#
    • 1...Rc5
      • 2.Qh4#
    • 1...exd5
      • 2.e6#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Qd6#
      • 1...Rc5
        • 2.Qh4#
      • 1...Rc6
        • 2.Scxb5#
      • 1...Bc6!
    • 1.Sb4?
      • threat
        • 2.Qd6#
      • 1...Rc5
        • 2.Qh4#
      • 1...Bc6
        • 2.Sbc2#
      • 1...Rc6!
    • 1.Qb4+?
      • 1...Rc4
        • 2.Sc2#
      • 1...axb4!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Qd6#
      • 1...Rc5
        • 2.Qh4#
      • 1...Rc6
        • 2.Sxb5#
      • 1...Bc6
        • 2.Sc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(f);OGATE::P(B),XR(f)
    • R(f);SBLOCK::QAR(H)
    • P(e);OGATE,XS(F)::B(I)+P(G)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR2(H)
      • Vars
        • R(f);SBLOCK::QAR(H)
        • R(f);S_CUTB(g)::S(F),XP(d)
      • Refutation
        • B(g);
    • Try
      • S(F);
      • Threat
        • QAR2(H)
      • Vars
        • R(f);SBLOCK::QAR(H)
        • B(g);S_CUTR(f)::S(F)
      • Refutation
        • R(f);
    • Try
      • Q(H);CHECK
      • Vars
        • R(f);P_SPINR(f)::S(E)
      • Refutation
        • P(c);XQ(H)
  • Actual
    • S(F);
    • Threat
      • QAR2(H)
    • Vars
      • R(f);SBLOCK::QAR(H)
      • R(f);S_CUTB(g)::S(E),XP(d)
      • B(g);S_CUTR(f)::S(E)
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