MESON Chess Problem Database

Problem Display
PID: 114721 (bn1bN2R/2p1k2n/r4pPB/p6K/3QpN2/7B/8/8 w - - 0 1)

Alvey, George Clarence Vincent

Hampstead Express, 1914

bn1bN2R/2p1k2n/r4pPB/p6K/3QpN2/7B/8/8

#2

8 + 10

6490 yacpdb 2009
15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Sd5#
    • 1...Ra7
      • 2.Qc5#
    • 1...Bd5
      • 2.Sxd5#
    • 1...Bc6
      • 2.Qc5#
    • 1...Sc6
      • 2.Sd5#
      • 2.Qc5#
      • 2.Qd7#
    • 1...Sd7
      • 2.Qxd7#
    • 1...f5
      • 2.Qg7#
    • 1...c6
      • 2.Qc5#
      • 2.Qxe4#
      • 2.Qd6#
  • Tries
    • 1.Qe5+?
      • 1...Re6
        • 2.Qxe6#
      • 1...fxe5!
    • 1.Qc4?
      • threat
        • 2.Qf7#
      • 1...Re6
        • 2.Qxe6#
      • 1...Bd5
        • 2.Sxd5#
      • 1...Sg5!
    • 1.Qxe4+?
      • 1...Re6
        • 2.Qxe6#
      • 1...Bxe4!
    • 1.Qd5?
      • threat
        • 2.Qf7#
      • 1...Bxd5
        • 2.Sxd5#
      • 1...Re6
        • 2.Qxe6#
      • 1...Sg5!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Rxh7#
      • 1...Rc6
        • 2.Sd5#
      • 1...Bd5
        • 2.Sxd5#
      • 1...Bc6
        • 2.Qa3#
      • 1...Sg5
        • 2.Bf8#
      • 1...Sf8
        • 2.Bxf8#
      • 1...Sc6
        • 2.Sd5#
      • 1...Sd7
        • 2.Qxd7#
      • 1...c6
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(c);S_CUTB(h)::S(C)
    • R(c);N_GUARD::QAB(B)
    • B(h);N_GUARD::S(C),XB(h)
    • B(h);S_CUTR(c)::QAB(B)
    • S(i);N_GUARD::QAR1(B),XS(i)
    • P(d);OGATE::QAR2(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(B),XR(c)
      • Refutation
        • P(d);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • R(c);N_GUARD::QAR1(B),XR(c)
        • B(h);N_GUARD::S(C),XB(h)
      • Refutation
        • S(g);
    • Try
      • Q(B);CHECK,XP(a)
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(B),XR(c)
      • Refutation
        • B(h);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • B(h);XQ(B)::S(C),XB(h)
        • R(c);N_GUARD::QAR1(B),XR(c)
      • Refutation
        • S(g);
  • Actual
    • Q(B);
    • Threat
      • R(H),XS(g)
    • Vars
      • R(c);S_CUTB(h)::S(C)
      • B(h);N_GUARD::S(C),XB(h)
      • B(h);S_CUTP(e),S_CUTR(c)::QAB(B)
      • S(g);N_GUARD::B(F)
      • S(g);N_GUARD::B(F),XS(g)
      • S(i);S_CUTB(h)::S(C)
      • S(i);N_GUARD::QAR1(B),XS(i)
      • P(e);S_CUTB(h),S_CUTR(c)::QAR(B),XP(a)
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