MESON Chess Problem Database

Problem Display
PID: 264825 (b2R2r1/1Qp2Rp1/6K1/3n2B1/2PPk3/7p/2P1N2r/5n1q w - - 0 1)

Andersen, Idon Bruno Hovedskou

1st Prize, Skakbladet, 1982

b2R2r1/1Qp2Rp1/6K1/3n2B1/2PPk3/7p/2P1N2r/5n1q

#2

9 + 10

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Re7#
    • 1...Re8
      • 2.Rxe8#
    • 1...Se3
      • 2.Rf4#
  • Tries
    • 1.Rxd5?
      • threat
        • 2.Sc3#
        • 2.Re5#
      • 1...Qf3
        • 2.Re5#
        • 2.Re7#
      • 1...Rxe2!
    • 1.Qxc7?
      • threat
        • 2.Qe5#
      • 1...Sf4+
        • 2.Qxf4#
      • 1...Se7+
        • 2.Qxe7#
      • 1...Sxc7
        • 2.Sc3#
      • 1...Sf6
        • 2.Qf4#
      • 1...Re8!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qd3#
      • 1...Sf4+
        • 2.Rxf4#
      • 1...Se7+
        • 2.Rxe7#
      • 1...Qf3
        • 2.Qxf3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Sb4
        • 2.Sc3#
        • 2.Rf4#
        • 2.Re7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(b);SBLOCK::R(H)
    • R(j);N_GUARD::R(I),XR(j)
    • S(a);SBLOCK::R1(H)
  • Tries
    • Try
      • R(I);XS(f)
      • Threat
        • DUALS(2)
      • Refutation
        • R(c);XS(B)
    • Try
      • Q(G);N_PINS(f),XP(g)
      • Threat
        • QAR1(G)
      • Vars
        • S(f);CHECK,N_GUARD::QAR1(G),XS(f)
        • S(f);CHECK,N_GUARD::QAR(G),XS(f)
        • S(f);N_GUARD,XQ(G)::S(B)
        • S(f);N_GUARD::QAR1(G)
      • Refutation
        • R(j);
  • Actual
    • Q(G);N_PINS(f)
    • Threat
      • QAB1(G)
    • Vars
      • S(f);CHECK,N_GUARD::R1(H),XS(f)
      • S(f);CHECK,N_GUARD::R(H),XS(f)
      • Q(b);N_GUARD::QAB1(G),XQ(b)
      • S(f);N_GUARD::S(B),XS(f)
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