MESON Chess Problem Database

Problem Display
PID: 206291 (8/8/1p6/1BP2K2/2QPp2B/1PR1bp1R/N1pk4/n2b4 w - - 0 1)

Howard, Kenneth Samuel

L'Alfiere di Re, 1925

8/8/1p6/1BP2K2/2QPp2B/1PR1bp1R/N1pk4/n2b4

#2

10 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd4
      • 2.Qxd4#
  • Tries
    • 1.Rxc2+?
      • 1...Sxc2
        • 2.Qc3#
      • 1...Bxc2!
    • 1.Rd3+?
      • 1...exd3
        • 2.Qxd3#
      • 1...Ke2!
    • 1.Rxe3?
      • threat
        • 2.Qc3#
      • 1...Kxe3
        • 2.Qc3#
      • 1...c1Q
        • 2.Qxc1#
      • 1...c1R
        • 2.Qxc1#
      • 1...Be2!
  • Keys
    • 1.Qb4!
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Sxb3
        • 2.Rxb3#
      • 1...bxc5
        • 2.Rxc5#
      • 1...Be2
        • 2.Rd3#
      • 1...Bf2
        • 2.Rcxf3#
      • 1...f2
        • 2.Rcxe3#
      • 1...c1Q
        • 2.Rxc1#
      • 1...c1S
        • 2.Rxc1#
      • 1...c1B
        • 2.Rxc1#
      • 1...c1R
        • 2.Rxc1#
      • 1...Bg1
        • 2.Rcxf3#
      • 1...Bf4
        • 2.Rcxf3#
      • 1...Bg5
        • 2.Rcxf3#
      • 1...Bh6
        • 2.Rcxf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
    • B(e);OGATE,XP(F)::QAR2(E),XB(e)
  • Tries
    • Try
      • R(C);CHECK,XP(c)
      • Vars
        • S(a);XR(C)::QAB1(E)
      • Refutation
        • B(b);XR(C)
    • Try
      • R(C);CHECK
      • Vars
        • P(g);OGATE,XR(C)::QAR1(E),XP(g)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • R(C);XB(e)
      • Threat
        • QAB1(E)
      • Vars
        • K(d);P_SPINP(f),S_FLIGHT,XR(C)::QAR2(E)
        • P(c);OGATE::QAB1(E),XQ(c)
        • P(c);OGATE::QAB1(E),XR(c)
      • Refutation
        • B(b);
  • Actual
    • Q(E);
    • Vars
      • B(e);OGATE,XP(F)::QAR2(E),XB(e)
      • S(a);OGATE,XP(B)::QAB(E)+R(C),XS(a)
      • P(h);OGATE,XP(I)::QAB(E)+R(C),XP(h)
      • B(b);SBLOCK::QAB(E)+R(C),DCHECK
      • B(e);OGATE::QAB(E)+R(C),XP(f)
      • P(f);::QAB(E)+R(C),XB(e)
      • P(c);OGATE::QAB(E)+R(C),XQ(c)
      • P(c);OGATE::QAB(E)+R(C),XS(c)
      • P(c);OGATE::QAB(E)+R(C),XB(c)
      • P(c);OGATE::QAB(E)+R(C),XR(c)
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