MESON Chess Problem Database

Problem Display
PID: 138652 (1B6/2PP4/bNp5/Rn1rkpK1/1P1p4/1Q1P4/8/8 w - - 0 1)

Rogers, HM

Schachaufgaben, 1887

1B6/2PP4/bNp5/Rn1rkpK1/1P1p4/1Q1P4/8/8

#2

9 + 7

3530 Het Half Pin Thema (II) 1947

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qxd5#
  • Tries
    • 1.c8Q+?
      • 1...Ke6
        • 2.Qe8#
      • 1...Rd6
        • 2.Qe8#
        • 2.Qh8#
      • 1...Sd6
        • 2.Qe8#
      • 1...Sc7!
    • 1.d8Q?
      • threat
        • 2.Qf6#
        • 2.Qe7#
      • 1...Ke6
        • 2.Qf6#
      • 1...Rxd8
        • 2.cxd8Q#
        • 2.cxd8S#
        • 2.cxd8B#
        • 2.cxd8R#
      • 1...Rd7
        • 2.Qf6#
      • 1...Bc8
        • 2.Qf6#
      • 1...Rd6!
  • Keys
    • 1.d8S!
      • threat
        • 2.Sc4#
      • 1...Kd6
        • 2.c8S#
      • 1...Rxd8
        • 2.cxd8Q#
        • 2.cxd8S#
        • 2.cxd8B#
        • 2.cxd8R#
      • 1...Sxc7
        • 2.Bxc7#
      • 1...Rc5
        • 2.Sf7#
        • 2.Qe6#
      • 1...Rd6
        • 2.Sf7#
      • 1...Rd7
        • 2.Qe6#
      • 1...Sa3
        • 2.c8Q#
        • 2.c8S#
        • 2.c8B#
        • 2.c8R#
      • 1...Sc3
        • 2.c8Q#
        • 2.c8S#
        • 2.c8B#
        • 2.c8R#
      • 1...Sd6
        • 2.Sd7#
      • 1...Sa7
        • 2.c8Q#
        • 2.c8S#
        • 2.c8B#
        • 2.c8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • P(g);N_GUARD::QAR1(A),XR(c)
  • Tries
    • Try
      • P(G);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINR(c)::QAR2(G)
        • S(b);P_SPINR(c),P_SPINS(b)::QAR(G)
      • Refutation
        • S(b);P_SPINR(c),P_SPINS(b)
    • Try
      • P(H);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);P-FLIGHT,P_SPINR(c)::QAR1(H)
        • R(c);P_SPINS(b)::QAB1(H)
        • B(f);::QAB1(H)
      • Refutation
        • R(c);P_SPINS(b)
  • Actual
    • P(H);
    • Threat
      • S(F)
    • Vars
      • K(d);S_FLIGHT::P=S
      • S(b);OGATE,P_SPINR(c),P_SPINS(b),XP(G)::B(I),XS(b)
      • R(c);P_SPINS(b)::S(H)
      • R(c);OGATE,P_SPINS(b)::QAR1(A)
      • S(b);P_SPINR(c),SBLOCK::S(F)
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