MESON Chess Problem Database

Problem Display
PID: 96542 (3q4/5b2/3pn1p1/2rk4/BP6/3K1P1N/7B/1NQ1R3 w - - 0 1)

Marcos, EM

Problemas, 1964

3q4/5b2/3pn1p1/2rk4/BP6/3K1P1N/7B/1NQ1R3

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3+
      • 2.Sxc3#
    • 1...Rc4
      • 2.Qxc4#
    • 1...Ra5
      • 2.Sc3#
      • 2.Bb3#
      • 2.Bc6#
      • 2.Qc4#
      • 2.Qc6#
    • 1...Rb5
      • 2.Bb3#
      • 2.Qc4#
    • 1...Rc6
      • 2.Bxc6#
      • 2.Qxc6#
    • 1...Sd4
      • 2.Sf4#
    • 1...Sf4+
      • 2.Sxf4#
    • 1...Sg5
      • 2.Sf4#
    • 1...Sc7
      • 2.Sf4#
    • 1...Sg7
      • 2.Sf4#
    • 1...Sf8
      • 2.Sf4#
  • Tries
    • 1.Bb3+?
      • 1...Rc4
        • 2.Qxc4#
      • 1...Kc6!
    • 1.Qg5+?
      • 1...Sxg5
        • 2.Sf4#
      • 1...Qxg5!
    • 1.Qxc5+?
      • 1...dxc5
        • 2.Sc3#
      • 1...Sxc5+!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qe4#
      • 1...Rc3+
        • 2.Sxc3#
      • 1...Sxf4+
        • 2.Sxf4#
      • 1...Qh4
        • 2.Qxd6#
      • 1...Rc4
        • 2.Qxc4#
      • 1...Sg5
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(a);CHECK,N_GUARD::S(A),XR(a)
    • R(a);N_GUARD::QAB1(B),XR(a)
    • S(d);N_GUARD::S(G)
    • S(d);CHECK,N_GUARD::S(G),XS(d)
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAB1(B),XR(a)
      • Refutation
        • K(b);P_SPINR(a),S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • S(d);XQ(B)::S(G)
      • Refutation
        • Q(g);XQ(B)
    • Try
      • Q(B);CHECK,XR(a)
      • Vars
        • P(c);XQ(B)::S(A)
      • Refutation
        • S(d);CHECK,XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • R(a);CHECK,N_GUARD::S(A),XR(a)
      • S(d);CHECK,XQ(B)::S(G),XS(d)
      • Q(g);N_GUARD::QAR1(B),XP(c)
      • R(a);N_GUARD::QAB1(B),XR(a)
      • S(d);N_GUARD::QAR1(B)
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Developed and maintained by Brian Stephenson.
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