MESON Chess Problem Database

Problem Display
PID: 149527 (2b4Q/1p3pr1/5R2/1PN5/3PR3/6p1/2Kn4/k1N5 w - - 0 1)

Heyl, Peter

Troll, 2012

2b4Q/1p3pr1/5R2/1PN5/3PR3/6p1/2Kn4/k1N5

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bh3
      • 2.Qa8#
    • 1...Bg4
      • 2.Qa8#
    • 1...Bf5
      • 2.Qa8#
    • 1...Bd7
      • 2.Qa8#
    • 1...Sb1
      • 2.S5b3#
    • 1...Sf1
      • 2.S5b3#
    • 1...Sb3
      • 2.S5xb3#
    • 1...Sf3
      • 2.S5b3#
    • 1...Sc4
      • 2.S5b3#
    • 1...Sxe4
      • 2.S5b3#
  • Tries
    • 1.Rf3?
      • threat
        • 2.Ra3#
      • 1...Sxf3
        • 2.S5b3#
      • 1...Sb1
        • 2.S5b3#
      • 1...Sb3
        • 2.S5xb3#
      • 1...Sc4
        • 2.S5b3#
      • 1...Be6!
    • 1.Qxc8?
      • threat
        • 2.Qa8#
      • 1...Sb1
        • 2.S5b3#
      • 1...Sb3
        • 2.S5xb3#
      • 1...Sc4
        • 2.S5b3#
      • 1...Rg8!
  • Keys
    • 1.d5!
      • threat
        • 2.Ra4#
      • 1...Sxe4
        • 2.S5b3#
      • 1...Rg4
        • 2.Ra6#
      • 1...Bf5
        • 2.Qa8#
      • 1...Sb1
        • 2.S5b3#
      • 1...Sc4
        • 2.S5b3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • B(g);OGATE::QAB(H)
    • B(g);OGATE,P_PINR(D)::QAB(H)
    • S(b);N_GUARD::S(F)
    • S(b);N_GUARD::S(F),XS(b)
    • S(b);N_GUARD,XR(D)::S(F)
  • Tries
    • Try
      • R(G);
      • Threat
        • R(G)
      • Vars
        • S(b);N_GUARD,XR(G)::S(F)
        • S(b);N_GUARD::S(F)
        • S(b);N_GUARD::S(F),XS(b)
      • Refutation
        • B(g);
    • Try
      • Q(H);XB(g)
      • Threat
        • QAB(H)
      • Vars
        • S(b);N_GUARD::S(F)
        • S(b);N_GUARD::S(F),XS(b)
      • Refutation
        • R(f);
  • Actual
    • P(C);
    • Threat
      • R(D)
    • Vars
      • S(b);N_GUARD,XR(D)::S(F)
      • R(f);::QAB(H)+R(G),DCHECK
      • B(g);OGATE,P_PINR(D)::QAB(H)
      • S(b);N_GUARD::S(F)
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