MESON Chess Problem Database

Problem Display
PID: 275365 (2b3K1/3p1Qp1/1p4r1/B5nB/p1p5/Rq2k3/3pN2N/5R2 w - - 0 1)

Andrade, Barry Jack da Costa

British Chess Magazine, 1935

2b3K1/3p1Qp1/1p4r1/B5nB/p1p5/Rq2k3/3pN2N/5R2

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Qf4#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sh3
      • 2.Qf3#
    • 1...Se4
      • 2.Qf3#
    • 1...Se6
      • 2.Qf3#
    • 1...Sh7
      • 2.Qf3#
  • Tries
    • 1.Rf3+?
      • 1...Ke4
        • 2.Qf5#
      • 1...Sxf3
        • 2.Qxf3#
      • 1...Kxe2!
    • 1.Qf2+?
      • 1...Ke4
        • 2.Qd4#
      • 1...Kd3!
  • Keys
    • 1.Qxc4!
      • threat
        • 2.Sg4#
      • 1...Qd3
        • 2.Rxd3#
        • 2.Qxd3#
        • 2.Qd4#
        • 2.Qf4#
      • 1...Sf3
        • 2.Rxf3#
      • 1...Sh3
        • 2.Rf3#
      • 1...Se4
        • 2.Rf3#
      • 1...Se6
        • 2.Rf3#
      • 1...Sf7
        • 2.Rf3#
        • 2.Qd4#
      • 1...Sh7
        • 2.Rf3#
      • 1...d5
        • 2.Qd4#
      • 1...d6
        • 2.Bxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(b);::QAB1(G)
    • S(f);N_GUARD::QAR1(G),XS(f)
    • S(f);N_GUARD::QAR1(G)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(c);N_GUARD,N_SPINQ(b),P-FLIGHT,S_CUTS(f)::QAB1(G)
        • S(f);OGATE,XR(A)::QAR1(G),XS(f)
      • Refutation
        • K(c);N_SPINQ(b),P-FLIGHT,XS(B)
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);N_SPINQ(b),OGATE,P-FLIGHT::QAR1(G)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(G);P_SPINQ(G),XP(e)
    • Threat
      • S(C)
    • Vars
      • S(f);N_GUARD::R1(A),XS(f)
      • S(f);N_GUARD::R1(A)
      • S(f);N_GUARD,N_PINQ(G)::R1(A)
      • P(i);N_PINQ(G)::QAB1(G)
      • P(i);S_CUTR(h)::B(E),XP(g)
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