MESON Chess Problem Database

Problem Display
PID: 222900 (6BB/7Q/1p6/2p2R2/2P1P3/r2k2K1/1R3P1p/7b w - - 0 1)

Jonsson, Nils Gustav Helmer

Suomen Shakki, 1956

6BB/7Q/1p6/2p2R2/2P1P3/r2k2K1/1R3P1p/7b

#2

9 + 6

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4+
      • 2.Rf3#
    • 1...Bf3
      • 2.Rxf3#
    • 1...Bxe4
      • 2.Rf3#
  • Tries
    • 1.Rd2+?
      • 1...Kxe4+
        • 2.Rf3#
      • 1...Kxd2+!
    • 1.Rf4?
      • threat
        • 2.Qd7#
      • 1...Bxe4
        • 2.Rf3#
        • 2.Qxe4#
      • 1...Ra7!
    • 1.Rf7?
      • threat
        • 2.Rd7#
      • 1...Kxc4+
        • 2.Rf3#
      • 1...Ra7!
    • 1.Qh5?
      • threat
        • 2.Qe2#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Kxe4+!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Rd6#
      • 1...Kd4+
        • 2.Rf3#
      • 1...Kc3
        • 2.Rf3#
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • K(d);CHECK,S_FLIGHT,XP(E)::QAB(G)+R(F)
    • B(a);N_GUARD::R(F),XB(a)
    • B(a);N_GUARD,XP(E)::R(F)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(d);CHECK,S_FLIGHT,XP(E)::QAB(G)+R(F)
      • Refutation
        • K(d);CHECK,P-FLIGHT,XR(A)
    • Try
      • R(F);
      • Threat
        • QAR(G)
      • Refutation
        • R(c);
    • Try
      • R(F);
      • Threat
        • R(F)
      • Vars
        • K(d);CHECK,S_FLIGHT,XP(D)::B(H)+R(F)
      • Refutation
        • R(c);
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • B(a);N_GUARD::QAR2(G),XB(a)
      • Refutation
        • K(d);CHECK,S_FLIGHT,XP(E)
  • Actual
    • R(F);
    • Threat
      • R(F)
    • Vars
      • K(d);CHECK,P-FLIGHT::B(I)+R(F)
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