MESON Chess Problem Database

Problem Display
PID: 63587 (3n2b1/r7/1PPNP1Q1/p2kn2R/2RP4/B1P1p3/2r4b/5B1K w - - 0 1)

Heinonen, Unto

2nd Prize, Cacciari MT, 1974

3n2b1/r7/1PPNP1Q1/p2kn2R/2RP4/B1P1p3/2r4b/5B1K

#2

12 + 9

3771 FIDE Album (1974-1976) 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Rg2
      • 2.Bxg2#
    • 1...Rxc3
      • 2.Bg2#
    • 1...Bg1
      • 2.Rxe5#
    • 1...Bxe6
      • 2.Qe4#
    • 1...Sxe6
      • 2.Qe4#
    • 1...e2
      • 2.Bg2#
  • Tries
    • 1.Se4?
      • threat
        • 2.Rc5#
      • 1...Rxc3
        • 2.Sxc3#
      • 1...Sxe6
        • 2.Sf6#
      • 1...Sb7!
    • 1.Sb5?
      • threat
        • 2.Rc5#
      • 1...Rxc3
        • 2.Sxc3#
      • 1...Sb7
        • 2.Sc7#
      • 1...Sxe6!
    • 1.Se8?
      • threat
        • 2.Rc5#
      • 1...Sxe6
        • 2.Sf6#
      • 1...Sb7
        • 2.Sc7#
      • 1...Rxc3!
  • Keys
    • 1.e7!
      • threat
        • 2.Rc5#
      • 1...Rxc3
        • 2.Bg2#
      • 1...Be6
        • 2.Qe4#
      • 1...Se6
        • 2.Qe4#
      • 1...Sb7
        • 2.Qxg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(a);N_GUARD::B(A),XR(a)
    • R(a);N_GUARD,XP(D)::B(A)
    • B(b);N_GUARD::R1(G),XS(f)
    • B(i);SBLOCK,XP(K)::QAB1(L)
    • S(h);SBLOCK,XP(K)::QAB1(L)
    • P(c);S_CUTR(a)::B(A)
  • Tries
    • Try
      • S(J);
      • Threat
        • R1(E)
      • Vars
        • R(a);XP(D)::S(J),XR(a)
        • S(h);SBLOCK,XP(K)::S(J)
      • Refutation
        • S(h);
    • Try
      • S(J);
      • Threat
        • R1(E)
      • Vars
        • R(a);XP(D)::S(J),XR(a)
        • S(h);S_CUTR(g)::S(J)
      • Refutation
        • S(h);XP(K)
    • Try
      • S(J);
      • Threat
        • R1(E)
      • Vars
        • S(h);SBLOCK,XP(K)::S(J)
        • S(h);S_CUTR(g)::S(J)
      • Refutation
        • R(a);XP(D)
  • Actual
    • P(K);
    • Threat
      • R1(E)
    • Vars
      • R(a);N_GUARD,XP(D)::B(A)
      • B(i);SBLOCK::QAB1(L)
      • S(h);SBLOCK::QAB1(L)
      • S(h);N_GUARD::QAB(L),XB(i)
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