MESON Chess Problem Database

Problem Display
PID: 239948 (4r3/3r4/1B5b/1R6/RPk5/1pN5/1P2b3/KQ3N2 w - - 0 1)

Hermanson, Halvar

Sinfonie Scacchistiche, 1967

4r3/3r4/1B5b/1R6/RPk5/1pN5/1P2b3/KQ3N2

#2

9 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Rc5#
  • Tries
    • 1.Re5?
      • threat
        • 2.b5#
      • 1...Ra7
        • 2.Qe4#
      • 1...Bf8
        • 2.Se3#
      • 1...Ra8!
    • 1.Rg5?
      • threat
        • 2.b5#
      • 1...Ra7
        • 2.Sd2#
      • 1...Ra8
        • 2.Se3#
      • 1...Bf8!
    • 1.Qe4+?
      • 1...Rd4
        • 2.Rc5#
        • 2.Qxd4#
      • 1...Rxe4!
  • Keys
    • 1.Rd5!
      • threat
        • 2.b5#
      • 1...Ra7
        • 2.Rd4#
      • 1...Ra8
        • 2.Qe4#
      • 1...Bf8
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(e);SBLOCK::R1(H)
  • Tries
    • Try
      • R(H);
      • Threat
        • R(F)+P(G)
      • Vars
        • R(e);N_GUARD,P_PINR(F)::QAR2(B)
        • B(d);N_GUARD::S(C)
      • Refutation
        • R(f);P_PINR(F)
    • Try
      • R(H);
      • Threat
        • R(F)+P(G)
      • Vars
        • R(e);N_GUARD,P_PINR(F)::S(C)
        • R(f);N_GUARD,P_PINR(F)::S(C)
      • Refutation
        • B(d);
    • Try
      • Q(B);CHECK
      • Refutation
        • R(f);XQ(B)
  • Actual
    • R(H);
    • Threat
      • R(F)+P(G)
    • Vars
      • R(e);N_GUARD,P_PINR(F)::R1(H)
      • R(f);N_GUARD,P_PINR(F)::QAR2(B)
      • B(d);N_GUARD::S(C)
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