MESON Chess Problem Database

Problem Display
PID: 236542 (1nNb3n/1Q4pr/2PP1Pkp/7p/5K1p/8/B1P5/B7 w - - 0 1)

Heyl, Peter

Rochade Europa, 1998

1nNb3n/1Q4pr/2PP1Pkp/7p/5K1p/8/B1P5/B7

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ba5
      • 2.Se7#
    • 1...Bb6
      • 2.Se7#
    • 1...Bc7
      • 2.Se7#
    • 1...Be7
      • 2.Sxe7#
    • 1...Sf7
      • 2.Bxf7#
      • 2.Qxf7#
  • Tries
    • 1.Be6?
      • threat
        • 2.Bf5#
      • 1...Bc7
        • 2.Se7#
      • 1...Be7
        • 2.Sxe7#
      • 1...Sd7!
    • 1.Qa7?
      • threat
        • 2.Qg1#
      • 1...Bb6
        • 2.Se7#
      • 1...Sf7
        • 2.Bxf7#
        • 2.Qxf7#
      • 1...Bxf6!
    • 1.Qe7?
      • threat
        • 2.Qe4#
      • 1...Bxe7
        • 2.Sxe7#
      • 1...gxf6!
    • 1.c7?
      • threat
        • 2.Qg2#
        • 2.Qe4#
      • 1...Bxf6
        • 2.Qe4#
      • 1...gxf6
        • 2.Qg2#
      • 1...Sf7
        • 2.Qe4#
      • 1...h3
        • 2.Qe4#
      • 1...Sc6!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qg1#
      • 1...Bxf6
        • 2.c3#
      • 1...Bb6
        • 2.Se7#
      • 1...Sf7
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(h);N_GUARD::S(I)
    • B(h);N_GUARD,P_PINP(F)::S(I)
    • B(h);N_GUARD::S(I),XB(h)
  • Tries
    • Try
      • B(B);
      • Threat
        • B(B)
      • Vars
        • B(h);N_GUARD,P_PINP(F)::S(I)
        • B(h);N_GUARD::S(I),XB(h)
      • Refutation
        • S(g);
    • Try
      • Q(H);
      • Threat
        • QAR(H)
      • Vars
        • B(h);N_GUARD::S(I)
      • Refutation
        • B(h);XP(G)
    • Try
      • Q(H);
      • Threat
        • QAB(H)
      • Vars
        • B(h);XQ(H)::S(I),XB(h)
      • Refutation
        • P(e);XP(G)
    • Try
      • P(E);
      • Threat
        • DUALS(2)
      • Vars
        • B(h);XP(G)::QAB(H)
        • P(e);XP(G)::QAR(H)
        • S(i);::QAB(H)
        • P(a);::QAB(H)
      • Refutation
        • S(g);
  • Actual
    • Q(H);
    • Threat
      • QAR(H)
    • Vars
      • B(h);SBLOCK,XP(G)::QAB(H)+P(C)
      • B(h);N_GUARD::S(I)
      • S(i);SBLOCK::QAB(H)+P(C)
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