MESON Chess Problem Database

Problem Display
PID: 257642 (KBrkq3/PRp4R/4P1N1/1r1b4/BN1Q2nb/8/8/8 w - - 0 1)

Andrade, Barry Jack da Costa

British Chess Magazine, 1934

KBrkq3/PRp4R/4P1N1/1r1b4/BN1Q2nb/8/8/8

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qh8
      • 2.Rxh8#
      • 2.Qxh8#
    • 1...Rxb8+
      • 2.axb8Q#
      • 2.axb8R#
  • Tries
    • 1.Qxd5+?
      • 1...Qd7
        • 2.Rh8#
        • 2.Qxd7#
      • 1...Rxd5!
  • Keys
    • 1.Rh8!
      • threat
        • 2.Sc6#
      • 1...Rxb8+
        • 2.axb8Q#
        • 2.axb8R#
      • 1...Qxh8
        • 2.Qxh8#
      • 1...Rxb4
        • 2.Rxe8#
        • 2.Qxd5#
      • 1...Qf8
        • 2.Rxf8#
      • 1...Qg8
        • 2.Rxg8#
      • 1...Rc5
        • 2.Rxe8#
      • 1...Rb6
        • 2.Rxe8#
      • 1...Se5
        • 2.Qxh4#
      • 1...c5
        • 2.Qxd5#
      • 1...c6
        • 2.Rd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • R(f);CHECK,OGATE,XB(J)::PXR(f)=Q
  • Tries
    • Try
      • Q(C);CHECK,N_SPINR(G),XB(d)
      • Refutation
        • R(c);XQ(C)
  • Actual
    • R(H);P_PINQ(h)
    • Threat
      • S(B)
    • Vars
      • R(f);CHECK,OGATE,XB(J)::PXR(f)=Q
      • Q(h);N_SPINQ(h),OGATE,XR(H)::QAR(C),XQ(h)
      • Q(h);OGATEB::R(H),XQ(h)
      • R(c);::R1(H),XQ(h)
      • S(a);OGATE::QAB(C),XB(b)
      • P(e);S_CUTR(c)::QAR(C),XB(d)
      • P(e);N_PINR(G)::R1(G)
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