MESON Chess Problem Database

Problem Display
PID: 46813 (4R2K/bQ5p/r7/R1pnN1N1/3k1Bp1/2p4q/2PPr3/8 w - - 0 1)

Wirtanen, Erkki Aukusti

1st Prize, Wrobel MT, 1959

4R2K/bQ5p/r7/R1pnN1N1/3k1Bp1/2p4q/2PPr3/8

#2

9 + 10

3749 FIDE Album (1959-1961) 1966

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Qe4#
    • 1...Sb6
      • 2.Se6#
    • 1...c4
      • 2.Rxd5#
      • 2.Qxd5#
  • Tries
    • 1.Sc6+?
      • 1...Kc4
        • 2.Qxa6#
        • 2.Qb3#
        • 2.Qb5#
      • 1...Rxc6!
    • 1.Qxa6?
      • threat
        • 2.Sc6#
        • 2.Qc4#
      • 1...Rxe5
        • 2.Bxe5#
      • 1...Sxf4
        • 2.Qc4#
      • 1...cxd2
        • 2.Qc4#
      • 1...Se3
        • 2.Qd3#
      • 1...Sb4
        • 2.Qc4#
      • 1...Sf6
        • 2.Qc4#
      • 1...Sc7
        • 2.Qc4#
      • 1...Se7
        • 2.Qc4#
      • 1...Qd3
        • 2.Sc6#
        • 2.Qxd3#
      • 1...Qh6
        • 2.Qd3#
        • 2.Qc4#
      • 1...c4
        • 2.Sc6#
        • 2.Qxc4#
      • 1...Sb6!
    • 1.Qb3?
      • threat
        • 2.Qc4#
      • 1...Rxe5
        • 2.Bxe5#
      • 1...Se3
        • 2.dxc3#
      • 1...Sb6
        • 2.Sc6#
      • 1...c4
        • 2.Qxc4#
      • 1...Qd3!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qc4#
      • 1...Rxe5
        • 2.Bxe5#
      • 1...Se3
        • 2.Qd3#
      • 1...Sb6
        • 2.Qxc5#
      • 1...Qd3
        • 2.Qxd3#
      • 1...c4
        • 2.Qxc4#
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(g);OGATE::QAR1(G)
    • S(g);S_CUTR(h)::S(F)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • R(h);XS(E)
    • Try
      • Q(G);XR(h)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);OGATE,XS(E)::B(C),XR(a)
        • S(g);XB(C)::QAR1(G)
        • P(b);XP(B)::QAR1(G)
        • S(g);S_CUTQ(c)::QAR1(G)
        • S(g);::QAR1(G)
      • Refutation
        • S(g);
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • R(a);OGATE,XS(E)::B(C),XR(a)
        • S(g);N_GUARD,S_CUTQ(c)::P(B),XP(b)
        • S(g);S_CUTR(h)::S(E)
        • P(f);::QAR1(G),XP(f)
      • Refutation
        • Q(c);
  • Actual
    • Q(G);
    • Threat
      • QAR1(G)
    • Vars
      • R(a);OGATE,XS(E)::B(C),XR(a)
      • S(g);S_CUTQ(c)::QAR1(G)
      • S(g);S_CUTB(i)::QAB1(G),XP(f)
      • Q(c);N_GUARD::QAR1(G),XQ(c)
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