MESON Chess Problem Database

Problem Display
PID: 22032 (b1R5/B4B2/2q2n2/1p1NpQ2/1bkp1p1R/2n5/P7/7K w - - 0 1)

ten Cate, Pieter

L'Alfiere di Re, 1923

b1R5/B4B2/2q2n2/1p1NpQ2/1bkp1p1R/2n5/P7/7K

#2

8 + 10

3147 Chess Problems: Introduction to an Art 1963
5066 Classic Chess Problems by Pioneer Composers 1970
3098 FIDE Album (1914-1944) (I) 1971
56 The Problemist 2014

SOLUTION

  • SOUND
  • Sets
    • 1...f3
      • 2.Se3#
  • Tries
    • 1.Rxc6+?
      • 1...Bc5
        • 2.Rxc5#
      • 1...Bxc6!
  • Keys
    • 1.Rh3!
      • threat
        • 2.Qd3#
      • 1...Sce4
        • 2.Sxf6#
      • 1...Sfe4
        • 2.Sxc3#
      • 1...d3
        • 2.Qxd3#
      • 1...f3
        • 2.Se3#
      • 1...e4
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(e);N_PINS(D),P_SPINP(d)::B(G)+S(D),DCHECK
  • Tries
    • Try
      • R(H);CHECK,N_SPINS(D),XQ(h)
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::R1(H),XB(b)
      • Refutation
        • B(j);P_PINS(D),XR(H)
  • Actual
    • R(C);
    • Threat
      • QAB1(E)
    • Vars
      • S(a);N_PINS(D)::B(G)+S(D),XS(i)
      • S(i);N_PINS(D)::B(G)+S(D),XS(a)
      • P(d);::QAB1(E),XP(d)
      • P(e);N_PINS(D)::B(G)+S(D),DCHECK
      • P(g);N_PINS(D)::B(G)+S(D),DCHECK
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