MESON Chess Problem Database

Problem Display
PID: 103916 (q3nB2/3B4/8/1N2pp2/2p1k3/1bQ1P3/r1PPK3/2b5 w - - 0 1)

Castanho, Arruda

Brazilian Championship, 1957

q3nB2/3B4/8/1N2pp2/2p1k3/1bQ1P3/r1PPK3/2b5

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Bxc6#
    • 1...Qa3
      • 2.Bc6#
    • 1...Qa4
      • 2.Bc6#
    • 1...Qa5
      • 2.Bc6#
    • 1...Qa7
      • 2.Bc6#
    • 1...Qb8
      • 2.Bc6#
    • 1...Bxc2
      • 2.Qxc4#
    • 1...Ba4
      • 2.Qxc4#
  • Tries
    • 1.d3+?
      • 1...cxd3+
        • 2.Qxd3#
      • 1...Kd5!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Sc3#
      • 1...Kd5
        • 2.Sc3#
      • 1...Rxc2
        • 2.Qxa8#
      • 1...Bxd2
        • 2.Qh1#
      • 1...Qa5
        • 2.Bc6#
      • 1...Bb2
        • 2.Qh1#
      • 1...c3
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • Q(h);N_GUARD::B(G),XQ(h)
    • Q(h);N_GUARD::B(G)
    • B(c);N_GUARD,XP(A)::QAR2(D),XP(d)
    • B(c);N_GUARD::QAR2(D),XP(d)
  • Tries
    • Try
      • P(B);CHECK,P_SPINP(A)
      • Vars
        • P(d);CHECK,OGATE,XP(B)::QAB1(D),XP(d)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • Q(D);
    • Threat
      • S(F)
    • Vars
      • K(e);S_FLIGHT::S(F)
      • R(b);OGATE,P_PINP(B),XP(A)::QAB(D),XQ(h)
      • B(a);OGATE,XP(B)::QAB(D)
      • Q(h);N_GUARD::B(G)
      • B(a);OGATE::QAB(D)
      • P(d);::S(F),XP(d)
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