MESON Chess Problem Database

Problem Display
PID: 261311 (2b2R1K/1P1p2n1/R2N3p/3pk3/4N3/Br1pPp1B/Q1r5/8 w - - 0 1)

Schneider, Matthias

Neue Zurcher Zeitung, 1986

2b2R1K/1P1p2n1/R2N3p/3pk3/4N3/Br1pPp1B/Q1r5/8

#2

10 + 10

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Qh2#
    • 1...Rh2
      • 2.Qxh2#
    • 1...Rcc3
      • 2.Qh2#
    • 1...Rc4
      • 2.Qh2#
    • 1...Rc5
      • 2.Qh2#
    • 1...Rc6
      • 2.Qh2#
    • 1...Rc7
      • 2.Qh2#
    • 1...Sh5
      • 2.Re8#
    • 1...Se6
      • 2.Rf5#
    • 1...Se8
      • 2.Rxe8#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Sf7#
      • 1...Rcxc3
        • 2.Qh2#
      • 1...Rb6
        • 2.Qxd5#
      • 1...Se6
        • 2.Rf5#
      • 1...Rbxc3!
    • 1.Sc5?
      • threat
        • 2.Sf7#
      • 1...Rxc5
        • 2.Qh2#
      • 1...Rb6
        • 2.Sxd3#
      • 1...Se6
        • 2.Rf5#
      • 1...d4!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Sf7#
      • 1...Rc6
        • 2.Qh2#
      • 1...Rb6
        • 2.Qxd5#
      • 1...Se6
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • R(a);OGATE::QAB(A)
    • R(a);OGATE::QAB(A),XR(a)
    • S(i);N_GUARD::R(I)
    • S(i);N_GUARD,SBLOCK::R1(I)
    • S(i);N_GUARD::R(I),XS(i)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(G)
      • Vars
        • R(a);OGATE,XS(E)::QAB(A)
        • R(b);OGATE::QAR1(A),XP(e)
        • S(i);N_GUARD,SBLOCK::R1(I)
      • Refutation
        • R(b);XS(E)
    • Try
      • S(E);
      • Threat
        • S(G)
      • Vars
        • R(a);OGATE,XS(E)::QAB(A)
        • R(b);N_GUARD::S(E),XP(c)
        • S(i);N_GUARD::R1(I)
      • Refutation
        • P(e);
  • Actual
    • S(E);
    • Threat
      • S(G)
    • Vars
      • R(a);OGATE::QAB(A)
      • R(b);OGATE::QAR1(A),XP(e)
      • S(i);SBLOCK::S(E)
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