MESON Chess Problem Database

Problem Display
PID: 143787 (8/8/8/8/1np1N1K1/r1r1B3/1Q4pk/R1b3nb w - - 0 1)

Heyl, Peter

Troll, 2011

8/8/8/8/1np1N1K1/r1r1B3/1Q4pk/R1b3nb

#2

5 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rc2
      • 2.Qe5#
    • 1...Rb3
      • 2.Qe5#
    • 1...Rd3
      • 2.Qe5#
    • 1...Bxb2
      • 2.Bxg1#
    • 1...Bd2
      • 2.Bxg1#
    • 1...Sa2
      • 2.Qb8#
    • 1...Sc2
      • 2.Qb8#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Qxg1#
        • 2.Qg3#
        • 2.Qf4#
      • 1...Bxe3
        • 2.Qg3#
      • 1...Se2
        • 2.Qh4#
      • 1...Sf3
        • 2.Qg3#
      • 1...Sh3
        • 2.Qg3#
      • 1...Sd3
        • 2.Qxg1#
        • 2.Qg3#
      • 1...Sd5
        • 2.Qxg1#
        • 2.Qg3#
      • 1...Rxe3!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Sf1#
      • 1...Bxb2
        • 2.Bxg1#
      • 1...Bxd2
        • 2.Bxg1#
      • 1...Rc2
        • 2.Qe5#
      • 1...Se2
        • 2.Sf3#
      • 1...Sc2
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(g);N_SPINP(d),OGATE::QAB(B)
    • R(g);OGATE::QAB(B)
    • B(a);N_SPINP(d),XQ(B)::B(C),XS(b)
    • B(a);N_SPINP(d)::B(C),XS(b)
    • S(h);OGATE::QAB(B)
    • S(h);N_SPINP(d),OGATE::QAB(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • B(a);XB(C)::QAB1(B)
        • S(b);N_GUARD::QAR2(B)
        • S(b);::QAB1(B)
      • Refutation
        • R(g);XB(C)
  • Actual
    • S(D);N_PINP(d)
    • Threat
      • S(D)
    • Vars
      • B(a);XQ(B)::B(C),XS(b)
      • B(a);XS(D)::B(C),XS(b)
      • R(g);OGATE::QAB(B)
      • S(b);N_GUARD::S(D)
      • S(h);OGATE::QAB(B)
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