MESON Chess Problem Database

Problem Display
PID: 17153 (2R1R3/B7/rr4QK/1B1b3n/n2k4/8/3P4/3N4 w - - 0 1)

Howard, Kenneth Samuel

L'Alfiere di Re, 1925

(First published on Tue Nov 10 1925)

2R1R3/B7/rr4QK/1B1b3n/n2k4/8/3P4/3N4

#2

8 + 6

5089 The Enjoyment of Chess Problems 1943
5064 100 Years of the American Two-move Chess Problem 1962
3098 FIDE Album (1914-1944) (I) 1971
14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.dxc3#
    • 1...Sg3
      • 2.Qf6#
    • 1...Sf4
      • 2.Qf6#
    • 1...Sf6
      • 2.Qd3#
      • 2.Qg1#
      • 2.Qxf6#
    • 1...Sg7
      • 2.Qf6#
  • Tries
    • 1.Bxb6+?
      • 1...Sc5
        • 2.Bxc5#
        • 2.Qd3#
        • 2.Qg1#
      • 1...Sxb6
        • 2.Qd3#
        • 2.Qg1#
      • 1...Rxb6!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Se2#
      • 1...Sxc3
        • 2.dxc3#
      • 1...Bc6
        • 2.Qg1#
      • 1...Be6
        • 2.Qe4#
      • 1...Bh1
        • 2.Rc4#
      • 1...Ba2
        • 2.Re4#
      • 1...Bg2
        • 2.Rc4#
      • 1...Bb3
        • 2.Re4#
      • 1...Bf3
        • 2.Rc4#
      • 1...Bc4
        • 2.Rxc4#
      • 1...Be4
        • 2.Rxe4#
      • 1...Bb7
        • 2.Rc4#
      • 1...Bf7
        • 2.Re4#
      • 1...Ba8
        • 2.Rc4#
      • 1...Bg8
        • 2.Re4#
      • 1...Sg3
        • 2.Qf6#
      • 1...Sf4
        • 2.Qf6#

There are these versions: 204347

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 1
  • Sets
    • S(a);OGATE::P(B),XS(a)
    • S(d);N_GUARD::QAB(D)
  • Tries
    • Try
      • B(F);CHECK,N_SPINQ(D),XR(f)
      • Refutation
        • R(e);P_PINQ(D),XB(F)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • S(a);OGATE,XS(A)::P(B),XS(a)
      • B(c);N_PINQ(D)::QAB(D)
      • B(c);N_PINQ(D)::QAR1(D)
      • B(c);N_GUARD::R1(G)
      • B(c);N_GUARD::R1(H)
      • B(c);N_GUARD::R1(G),XB(c)
      • B(c);N_GUARD::R1(H),XB(c)
      • S(d);N_GUARD::QAB(D)
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