MESON Chess Problem Database

Problem Display
PID: 265134 (3R2bB/2P4r/1Np4r/K2Bq3/PQpkP1R1/3p1n2/1n3P2/8 w - - 0 1)

Cacciari, Europe

Parallele 50, 1947

(First published on Sat Jan 18 1947)

3R2bB/2P4r/1Np4r/K2Bq3/PQpkP1R1/3p1n2/1n3P2/8

#2

11 + 10

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd5
      • 2.exd5#
    • 1...Sd1
      • 2.Qxc4#
    • 1...Sxa4
      • 2.Qxc4#
    • 1...cxd5
      • 2.exd5#
  • Tries
    • 1.Qxb2+?
      • 1...c3
        • 2.Qb4#
      • 1...Kc5!
  • Keys
    • 1.Sxc4!
      • threat
        • 2.Sxb2#
      • 1...Sxc4+
        • 2.Qxc4#
      • 1...Qxh8
        • 2.e5#
      • 1...Sxa4
        • 2.Sb2#
        • 2.Sd2#
        • 2.Sa3#
        • 2.Se3#
        • 2.Sxe5#
        • 2.Sb6#
        • 2.Sd6#
      • 1...Qf6
        • 2.Bf7#
      • 1...Qg7
        • 2.Be6#
      • 1...Sd1
        • 2.Sb2#
        • 2.Sd2#
        • 2.Sa3#
        • 2.Se3#
        • 2.Sxe5#
        • 2.Sb6#
        • 2.Sd6#
      • 1...Sd2
        • 2.Bxe5#
      • 1...c5
        • 2.Qxb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • B(j);OGATE,P_SPINB(j),XB(G)::R(E)+P(D),XB(j)
    • S(a);N_GUARD::QAR1(C),XP(d)
    • S(a);N_GUARD,XP(B)::QAR1(C),XP(d)
    • P(g);OGATE,XB(G)::R(E)+P(D),XP(g)
  • Tries
    • Try
      • Q(C);CHECK,N_PINP(d),XS(a)
      • Vars
        • P(d);OGATEB,P_SPINP(d)::QAR2(C)
      • Refutation
        • K(e);N_PINB(G),N_SPINQ(f),S_FLIGHT
  • Actual
    • S(H);XP(d)
    • Threat
      • QAR(C)+S(H),XS(a)
    • Vars
      • S(a);CHECK,OGATE,P_SPINS(a),XS(H)::QAR1(C),XS(a)
      • Q(f);N_PINB(G),N_SPINQ(f),OGATE,XB(K)::R(E)+P(D)
      • Q(f);N_PINB(G)::R(J)+B(G)
      • S(c);N_GUARD::B(K),XQ(f)
      • P(g);N_PINB(G),SBLOCK::QAB(C),XS(a)
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