MESON Chess Problem Database

Problem Display
PID: 175247 (2N3B1/1Q6/p2PnR2/P7/P1kr1P1K/3N1p1b/3R4/B1n5 w - - 0 1)

Berry, Charles Vincent E

San Francisco Chronicle, 1902

2N3B1/1Q6/p2PnR2/P7/P1kr1P1K/3N1p1b/3R4/B1n5

#2

12 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf4+
      • 2.Rxf4#
    • 1...Rd5
      • 2.Qb4#
    • 1...Rxd6
      • 2.Sxd6#
    • 1...Sb3
      • 2.Sb6#
    • 1...Sxd3
      • 2.Rc2#
  • Tries
    • 1.Bxe6+?
      • 1...Rd5
        • 2.Bxd5#
        • 2.Qxd5#
        • 2.Qb4#
      • 1...Bxe6!
    • 1.Qb3+?
      • 1...Sxb3
        • 2.Sb6#
      • 1...Kxb3!
  • Keys
    • 1.Rf7!
      • threat
        • 2.Rc7#
      • 1...Rxf4+
        • 2.Rxf4#
      • 1...Rxd6
        • 2.Sxd6#
      • 1...Sxd3
        • 2.Rc2#
      • 1...Rd5
        • 2.Qb4#
      • 1...Sb3
        • 2.Sb6#
      • 1...Sc5
        • 2.Se5#
      • 1...Sc7
        • 2.Rxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(e);CHECK,OGATE,XP(E)::R(I),XR(e)
    • R(e);N_PINP(E),N_SPINS(g),SBLOCK::QAR1(J)
    • R(e);N_PINP(E),XP(H)::S(K),XR(e)
    • S(a);SBLOCK::S(K)
    • S(a);SBLOCK,XS(C)::R(B)
  • Tries
    • Try
      • B(L);CHECK,XS(g)
      • Refutation
        • B(c);XB(L)
    • Try
      • Q(J);CHECK
      • Vars
        • S(a);SBLOCK,XQ(J)::S(K)
      • Refutation
        • K(d);S_FLIGHT,XQ(J)
  • Actual
    • R(I);N_PINS(g)
    • Threat
      • R(I)
    • Vars
      • R(e);CHECK,OGATE,XP(E)::R(I),XR(e)
      • R(e);N_PINP(E),XP(H)::S(K),XR(e)
      • S(a);SBLOCK,XS(C)::R(B)
      • R(e);N_PINP(E),SBLOCK::QAR1(J)
      • S(a);SBLOCK::S(K)
      • S(g);SBLOCK::S(C)
      • S(g);::B(L)+R(I),DCHECK,XS(g)
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