MESON Chess Problem Database

Problem Display
PID: 200346 (8/4K1pp/6Qr/P1pkp2p/4R2P/4P3/8/1B4B1 w - - 0 1)

Laaksonen, Hellmuth

Suomen Shakki, 1957

8/4K1pp/6Qr/P1pkp2p/4R2P/4P3/8/1B4B1

#2

8 + 7

SOLUTION

  • SOUND
  • Tries
    • 1.Rb4?
      • threat
        • 2.Be4#
        • 2.Qe4#
        • 2.e4#
      • 1...Rxg6
        • 2.Be4#
      • 1...hxg6
        • 2.Be4#
      • 1...c4
        • 2.Rb5#
        • 2.e4#
      • 1...e4
        • 2.Qxe4#
      • 1...cxb4!
    • 1.Rxe5+?
      • 1...Kxe5
        • 2.Qe4#
        • 2.Qf5#
        • 2.Qg5#
      • 1...Kc4!
    • 1.Qf7+?
      • 1...Re6+
        • 2.Qxe6#
      • 1...Kc6!
  • Keys
    • 1.Ra4!
      • threat
        • 2.Be4#
        • 2.Qe4#
        • 2.e4#
      • 1...Rxg6
        • 2.Be4#
      • 1...hxg6
        • 2.Be4#
      • 1...c4
        • 2.e4#
      • 1...e4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);
      • Threat
        • DUALS(3)
      • Vars
        • R(e);XQ(G)::B(A)
        • P(g);XQ(G)::B(A)
        • P(c);::QAB1(G),XP(c)
      • Refutation
        • P(a);XR(D)
    • Try
      • R(D);CHECK,XP(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • R(e);CHECK,N_GUARD,P_SPINR(e)::QAB1(G),XR(e)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(D);
    • Threat
      • DUALS(3)
    • Vars
      • R(e);XQ(G)::B(A)
      • P(g);XQ(G)::B(A)
      • P(a);::P(C)
      • P(c);::QAB1(G),XP(c)
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