MESON Chess Problem Database

Problem Display
PID: 82227 (b7/3N2p1/p3p2b/rR1P4/2Nk3r/pP6/2K4p/7Q w - - 0 1)

Ahues, Herbert Siegfried Oskar

diagrammes, 1980

b7/3N2p1/p3p2b/rR1P4/2Nk3r/pP6/2K4p/7Q

#2

7 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Qa1#
  • Tries
    • 1.Sf8?
      • threat
        • 2.Sxe6#
      • 1...exd5
        • 2.Se6#
      • 1...Re4
        • 2.Qa1#
      • 1...e5
        • 2.Se6#
      • 1...Bxd5!
    • 1.Qf3?
      • threat
        • 2.Qd3#
      • 1...Be3
        • 2.Qxe3#
      • 1...Rh3!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Sxe6#
      • 1...Bxd5
        • 2.Qa1#
      • 1...exd5
        • 2.Se6#
        • 2.Qa1#
      • 1...Re4
        • 2.Qxe4#
      • 1...e5
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(d);SBLOCK::QAB(A)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(G),XP(g)
      • Vars
        • P(g);XP(F)::S(G)
        • R(d);SBLOCK::QAB(A)
        • P(g);::S(G)
      • Refutation
        • B(j);XP(F)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(h);N_GUARD::QAB1(A),XB(h)
      • Refutation
        • R(d);
  • Actual
    • S(G);
    • Threat
      • S(G),XP(g)
    • Vars
      • B(j);SBLOCK,XP(F)::QAB(A)
      • R(d);N_GUARD::QAR1(A),XR(d)
      • P(g);::S(G)
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