MESON Chess Problem Database

Problem Display
PID: 54175 (1b3r2/2NQP1R1/q2npp2/1BRp1k1N/5B2/2P2p1b/6pK/4r1n1 w - - 0 1)

Wirtanen, Erkki Aukusti

4th Prize, Chess Life, 1955-1956

1b3r2/2NQP1R1/q2npp2/1BRp1k1N/5B2/2P2p1b/6pK/4r1n1

#2

10 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qxe6#
    • 1...Rb1
      • 2.Qxe6#
    • 1...Rc1
      • 2.Qxe6#
    • 1...Rd1
      • 2.Qxe6#
    • 1...Rf1
      • 2.Qxe6#
    • 1...Se2
      • 2.Qxe6#
    • 1...Se4
      • 2.Rxd5#
  • Tries
    • 1.Sxe6?
      • threat
        • 2.Sg3#
      • 1...Ke4
        • 2.Sg3#
      • 1...Se2
        • 2.Sg5#
      • 1...Se4
        • 2.Sd4#
      • 1...Rxe6!
    • 1.Bd3+?
      • 1...Re4
        • 2.Rxd5#
        • 2.Qxe6#
      • 1...Se4
        • 2.Rxd5#
      • 1...Qxd3!
  • Keys
    • 1.Sxd5!
      • threat
        • 2.Sg3#
      • 1...Ke4
        • 2.Sg3#
      • 1...Se2
        • 2.Sdxf6#
      • 1...Se4
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(a);N_GUARD::QAB1(H),XP(j)
    • S(b);S_CUTR(a)::QAB1(H),XP(j)
    • S(i);SBLOCK,S_CUTR(a)::R(E),XP(f)
  • Tries
    • Try
      • S(G);XP(j)
      • Threat
        • S(F)
      • Vars
        • K(g);N_SPINP(f),S_FLIGHT::S(F)
        • S(b);S_CUTR(a)::QAB(H)+S(G)
        • S(i);P_PINB(C),SBLOCK::QAB(H)+S(G),DCHECK
      • Refutation
        • R(a);P_SPINR(a),XS(G)
    • Try
      • B(D);CHECK
      • Vars
        • S(i);P_SPINS(i)::R(E),XP(f)
      • Refutation
        • Q(h);XB(D)
  • Actual
    • S(G);P_PINP(j),XP(f)
    • Threat
      • S(F)
    • Vars
      • K(g);N_SPINP(j),S_FLIGHT::S(F)
      • S(b);S_CUTR(a)::R(E)+S(G),XP(k)
      • S(i);P_PINB(C),SBLOCK::R(E)+S(G),DCHECK
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