MESON Chess Problem Database

Problem Display
PID: 150665 (4K2B/4R3/B1pN1N2/7R/1prk1p2/1pr2p2/2p1bp2/3n4 w - - 0 1)

Akerblom, Johan Axel

Brisbane Courier, 1933

4K2B/4R3/B1pN1N2/7R/1prk1p2/1pr2p2/2p1bp2/3n4

#2

7 + 12

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Sg4#
      • 2.Sd7#
      • 2.Sh7#
      • 2.Sg8#
    • 1...Rc5
      • 2.Sd5#
      • 2.Re4#
    • 1...Bd3
      • 2.Sg4#
      • 2.Sd7#
      • 2.Sh7#
      • 2.Sg8#
    • 1...c5
      • 2.Rd5#
  • Tries
    • 1.Sb5+?
      • 1...cxb5
        • 2.Rd5#
      • 1...Kd3!
    • 1.Sf5+?
      • 1...Kd3
        • 2.Rd7#
      • 1...Kc5!
    • 1.Sd5+?
      • 1...Kc5
        • 2.Sb7#
      • 1...Kd3!
  • Keys
    • 1.Rd7!
      • threat
        • 2.Sxc4#
      • 1...Re3+
        • 2.Sde4#
      • 1...Kd3
        • 2.Sxc4#
        • 2.Sf5#
      • 1...Ke3
        • 2.Sf5#
      • 1...Rd3
        • 2.Sg4#
      • 1...Rc5
        • 2.Sd5#
      • 1...Se3
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • P(l);N_GUARD::R1(A)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • P(l);XS(C)::R1(A)
      • Refutation
        • K(j);P-FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(j);P-FLIGHT,P_SPINR(i)::R(E)
      • Refutation
        • K(j);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(j);S_FLIGHT::S(C)
      • Refutation
        • K(j);P-FLIGHT,P_SPINR(i)
  • Actual
    • R(E);
    • Threat
      • R(E)+S(C),XR(i)
    • Vars
      • R(f);CHECK,SBLOCK::R(E)+S(C)
      • K(j);S_FLIGHT::S(C)
      • R(f);SBLOCK::B(G)+S(D)
      • R(i);SBLOCK::B(G)+S(D)
      • S(a);SBLOCK::R(E)+S(C),DCHECK
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