MESON Chess Problem Database

Problem Display
PID: 6974 (6B1/B4r2/1r6/bpPQp2p/pk3NR1/n6R/4P3/3KN3 w - - 0 1)

Valve, Leo Erland

1st Prize, Dortmunder Zeitung, 1935

6B1/B4r2/1r6/bpPQp2p/pk3NR1/n6R/4P3/3KN3

#2

10 + 9

3098 FIDE Album (1914-1944) (I) 1971
56 The Problemist 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Sc2#
    • 1...Sc2
      • 2.Sxc2#
    • 1...Sc4
      • 2.Sc2#
  • Tries
    • 1.Qd4+?
      • 1...Sc4
        • 2.Sc2#
        • 2.Sd5#
      • 1...exd4!
  • Keys
    • 1.Qxe5!
      • threat
        • 2.Qc3#
      • 1...Rd6+
        • 2.Sd5#
      • 1...Rd7+
        • 2.Sfd3#
      • 1...Kc4
        • 2.Sxh5#
      • 1...Sb1
        • 2.Qd4#
      • 1...Sc4
        • 2.Sc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::S(B)
    • S(a);N_GUARD::S(B),XS(a)
  • Tries
    • Try
      • Q(H);CHECK
      • Refutation
        • P(f);XQ(H)
  • Actual
    • Q(H);XP(f)
    • Threat
      • QAB1(H)
    • Vars
      • R(h);CHECK::R(F)+S(E),DCHECK
      • R(i);CHECK::R(F)+S(E),DCHECK
      • K(c);P-FLIGHT,P_SPINR(i)::R(F)+S(E),XP(g)
      • S(a);N_GUARD::QAR2(H)
      • S(a);N_GUARD,SBLOCK::S(B)
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