MESON Chess Problem Database

Problem Display
PID: 90574 (BQn2B2/1Nr1p2K/7N/3pk1P1/3R1n2/2RPP3/8/8 w - - 0 1)

Barnes, Barry Peter

Die Schwalbe, 1960

BQn2B2/1Nr1p2K/7N/3pk1P1/3R1n2/2RPP3/8/8

#2

11 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...e6+
      • 2.Bg7#
  • Tries
    • 1.Sd8?
      • 1...e6+
        • 2.Sdf7#
      • 1...Kd6
        • 2.Qxc7#
      • 1...Se2
        • 2.Rxd5#
      • 1...Sg2
        • 2.Rxd5#
      • 1...Sh3
        • 2.Rxd5#
      • 1...Sh5
        • 2.Rxd5#
      • 1...Se6
        • 2.Sdf7#
        • 2.Rxd5#
      • 1...Sg6
        • 2.Rxd5#
      • 1...Sb6
        • 2.Qxc7#
      • 1...Sd6
        • 2.Bg7#
      • 1...Sa7
        • 2.Qxc7#
      • 1...Sxd3!
    • 1.Qxc7+?
      • 1...Ke6
        • 2.Sc5#
        • 2.Sd8#
      • 1...Sd6!
  • Keys
    • 1.Sc5!
      • 1...e6+
        • 2.Sd7#
      • 1...Kd6
        • 2.Sf7#
      • 1...Sxd3
        • 2.Rxd5#
      • 1...Se2
        • 2.Rxd5#
      • 1...Sg2
        • 2.Rxd5#
      • 1...Sh3
        • 2.Rxd5#
      • 1...Sh5
        • 2.Rxd5#
      • 1...Se6
        • 2.Rxd5#
      • 1...Sg6
        • 2.Rxd5#
      • 1...Sb6
        • 2.Qxc7#
      • 1...Sd6
        • 2.Bg7#
      • 1...Sa7
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • P(e);CHECK,SBLOCK::B(K)
  • Tries
    • Try
      • S(G);
      • Vars
        • P(e);CHECK,SBLOCK::S(G)
        • K(c);P_SPINP(b),S_FLIGHT::QAB1(J),XR(d)
        • S(a);N_GUARD::R1(D),XP(b)
        • S(f);N_GUARD::QAB(J),XR(d)
        • S(f);N_SPINR(d),SBLOCK::B(K)
      • Refutation
        • S(a);XP(B)
    • Try
      • Q(J);CHECK,XR(d)
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • S(G);
    • Vars
      • P(e);CHECK,SBLOCK::S(G)
      • K(c);P_SPINP(b),S_FLIGHT::S(F)
      • S(a);N_GUARD,XP(B)::R1(D),XP(b)
      • S(a);N_GUARD::R1(D),XP(b)
      • S(f);N_GUARD::QAB(J),XR(d)
      • S(f);N_SPINR(d),SBLOCK::B(K)
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