MESON Chess Problem Database

Problem Display
PID: 196450 (7b/8/4n1RB/6p1/3pPk2/3P1N2/1K2P3/3BQ2N w - - 0 1)

Paalanen, Erkki

Suomen Shakki, 1984

7b/8/4n1RB/6p1/3pPk2/3P1N2/1K2P3/3BQ2N

#2

10 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qd2#
    • 1...Kg4
      • 2.Qh4#
  • Tries
    • 1.Bxg5+?
      • 1...Kg4
        • 2.Qh4#
      • 1...Sxg5!
    • 1.Rxg5?
      • threat
        • 2.Qd2#
      • 1...Ke3
        • 2.Qd2#
      • 1...Sxg5!
    • 1.e3+?
      • 1...Kg4
        • 2.Sg1#
        • 2.Sxg5#
        • 2.Qh4#
      • 1...dxe3+!
  • Keys
    • 1.Sxg5!
      • threat
        • 2.Qg3#
      • 1...Ke3
        • 2.Sxe6#
      • 1...Kg4
        • 2.e3#
      • 1...Ke5
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB1(B)
    • K(b);P-FLIGHT::QAR1(B)
  • Tries
    • Try
      • B(J);CHECK,XP(c)
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • S(d);XB(J)
    • Try
      • R(I);XP(c)
      • Threat
        • QAB(B)
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
      • Refutation
        • S(d);P_SPINS(d),XR(I)
    • Try
      • P(E);CHECK
      • Refutation
        • P(a);CHECK,XP(E)
  • Actual
    • S(G);XP(c)
    • Threat
      • QAB1(B)
    • Vars
      • K(b);S_FLIGHT::B(J)+S(G),XS(d)
      • K(b);P-FLIGHT::B(A)+P(E)
      • K(b);S_FLIGHT::S(G)
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