MESON Chess Problem Database

Problem Display
PID: 6485 (1R6/5n1q/2p2Q1p/5rp1/BBpr1b2/2N1p3/pk2N1K1/4R3 w - - 0 1)

Schiffmann, Israel Abraham

1st Prize, Upsala Schacksallskap, 1929

1R6/5n1q/2p2Q1p/5rp1/BBpr1b2/2N1p3/pk2N1K1/4R3

#2

8 + 12

35 L'Italia Scacchistica 1930
1397 Faszinierendes Schachproblem 1963
3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Bc5#
    • 1...Re5
      • 2.Bc5#
    • 1...Rxf6
      • 2.Bd6#
    • 1...Be5
      • 2.Bd6#
    • 1...Se5
      • 2.Be7#
    • 1...a1S
      • 2.Rb1#
    • 1...a1B
      • 2.Rb1#
  • Tries
    • 1.Sd1+?
      • 1...Ka1
        • 2.Bc3#
      • 1...Kb1!
  • Keys
    • 1.Rc1!
      • threat
        • 2.Sd1#
      • 1...Rxf6
        • 2.Bd6#
      • 1...a1Q
        • 2.Rc2#
      • 1...a1S
        • 2.Rb1#
      • 1...a1B
        • 2.Rb1#
        • 2.Rc2#
      • 1...a1R
        • 2.Rc2#
      • 1...Rd1
        • 2.Sxd1#
      • 1...Re5
        • 2.Bc5#
      • 1...Be5
        • 2.Bd6#
      • 1...Se5
        • 2.Be7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(e);S_CUTB(f)::R(H)+B(F)
    • R(g);S_CUTB(f)::R(H)+B(F)
    • R(g);N_GUARD,XQ(G)::R(H)+B(F)
    • B(f);S_CUTR(g)::R(H)+B(F)
    • S(k);S_CUTB(f),S_CUTR(g)::R(H)+B(F)
    • P(a);N_GUARD::R1(A)
  • Tries
    • Try
      • S(D);CHECK,P_PINR(e)
      • Vars
        • K(b);S_FLIGHT::B(F)
      • Refutation
        • K(b);N_SPINR(e),P-FLIGHT
  • Actual
    • R(A);
    • Threat
      • S(D)
    • Vars
      • R(g);N_GUARD,XQ(G)::R(H)+B(F)
      • P(a);SBLOCK::R1(A)
      • P(a);N_GUARD::R1(A)
      • R(e);::QAB(G)+S(D),DCHECK,XR(e)
      • R(g);S_CUTB(f)::R(H)+B(F)
      • B(f);S_CUTR(g)::R(H)+B(F)
      • S(k);S_CUTB(f),S_CUTR(g)::R(H)+B(F)
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