MESON Chess Problem Database

Problem Display
PID: 99188 (4R2b/8/2N1Np1K/5k2/R7/3n3P/4Pr2/BQn4b w - - 0 1)

Jakab, Arpad

Magyar Sakkelet, 1955

4R2b/8/2N1Np1K/5k2/R7/3n3P/4Pr2/BQn4b

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe2
      • 2.Rf4#
    • 1...Rg2
      • 2.Rf4#
      • 2.e4#
    • 1...Rh2
      • 2.Rf4#
    • 1...Rf3
      • 2.e4#
    • 1...Rf4
      • 2.Rxf4#
    • 1...Bf3
      • 2.Rf4#
    • 1...Bg7+
      • 2.Sxg7#
  • Tries
    • 1.Qxd3+?
      • 1...Be4
        • 2.Ra5#
        • 2.Qxe4#
      • 1...Sxd3!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qh7#
      • 1...Bg7+
        • 2.Sxg7#
      • 1...Rg2
        • 2.e4#
      • 1...Sf4
        • 2.Sed4#
      • 1...Se5
        • 2.Scd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(c);N_GUARD,XP(C)::R1(E)
    • R(c);N_GUARD,P_PINP(D)::R1(E)
    • R(c);S_CUTB(b)::P(C)
    • R(c);N_GUARD::R1(E),XR(c)
    • B(b);S_CUTR(c)::R1(E)
    • B(g);CHECK,N_GUARD::S(G),XB(g)
  • Tries
    • Try
      • Q(B);CHECK,XS(d)
      • Refutation
        • S(a);XQ(B)
  • Actual
    • Q(B);N_PINS(d)
    • Threat
      • QAB(B)
    • Vars
      • B(g);CHECK,N_GUARD::S(G),XB(g)
      • R(c);S_CUTB(b)::P(C)
      • S(d);SBLOCK::S(G)
      • S(d);SBLOCK::S(F)
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