MESON Chess Problem Database

Problem Display
PID: 69107 (8/8/8/8/pQ1Nr1p1/Kn1R1bB1/3PPP1N/2Rnk3 w - - 0 1)

Berkovec, Jan

Shakhmatny Listok, 1928

8/8/8/8/pQ1Nr1p1/Kn1R1bB1/3PPP1N/2Rnk3

#2

10 + 7

5584 Galerie Ceskoslovenskych Skladatelu 01 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe2
      • 2.Sc2#
    • 1...Re3
      • 2.fxe3#
    • 1...Bh1
      • 2.f3#
      • 2.f4#
    • 1...Bxe2
      • 2.Sc2#
      • 2.f3#
      • 2.f4#
    • 1...Bg2
      • 2.f3#
      • 2.f4#
    • 1...Sxd2
      • 2.Qxd2#
  • Tries
    • 1.Rxb3?
      • threat
        • 2.d3#
      • 1...Rxe2
        • 2.Sc2#
      • 1...Rxd4!
    • 1.Qxb3?
      • threat
        • 2.Rxd1#
        • 2.Qxd1#
      • 1...Rxd4
        • 2.Qxd1#
      • 1...Bxe2
        • 2.Sc2#
        • 2.f3#
        • 2.f4#
      • 1...axb3!
  • Keys
    • 1.Re3!
      • threat
        • 2.Sc2#
      • 1...Rxe3
        • 2.fxe3#
      • 1...Rxd4
        • 2.exf3#
      • 1...Sxd4
        • 2.d3#
      • 1...Sa1
        • 2.d3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(f);SBLOCK,XP(C)::S(J)
    • R(f);OGATE::B(H)+P(D),XR(f)
    • S(c);OGATE,XP(B)::QAB1(I),XS(c)
  • Tries
    • Try
      • R(G);XS(c)
      • Threat
        • QAB(I)+P(B)
      • Vars
        • R(f);SBLOCK,XP(C)::S(J)
      • Refutation
        • R(f);XS(J)
    • Try
      • Q(I);XS(c)
      • Threat
        • DUALS(2)
      • Vars
        • R(f);XS(J)::QAR1(I),XS(a)
      • Refutation
        • P(e);XQ(I)
  • Actual
    • R(G);
    • Threat
      • S(J)
    • Vars
      • R(f);OGATE,XR(G)::B(H)+P(D),XR(f)
      • R(f);N_GUARD,XS(J)::R(G)+P(C),XB(d)
      • S(c);N_GUARD,XS(J)::QAB(I)+P(B)
      • S(c);N_GUARD::QAB(I)+P(B)
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