MESON Chess Problem Database

Problem Display
PID: 101301 (3NbB2/2ppn3/3nPNP1/Ppk3rR/1p6/1KPp3Q/8/6b1 w - - 0 1)

Windle, REL

Good Companions (May), 1919

3NbB2/2ppn3/3nPNP1/Ppk3rR/1p6/1KPp3Q/8/6b1

#2

10 + 11

3391 Het Half Pin Thema 1924
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2
      • 2.Qe3#
    • 1...Be3
      • 2.Qxe3#
    • 1...Bd4
      • 2.cxb4#
    • 1...Sd5
      • 2.Se4#
    • 1...Sc6
      • 2.Sb7#
    • 1...Sc8
      • 2.Rxg5#
    • 1...Sg8
      • 2.Rxg5#
  • Tries
    • 1.Rxg5+?
      • 1...Sd5
        • 2.Se4#
        • 2.Rxd5#
      • 1...Sef5
        • 2.Rxf5#
        • 2.Qxf5#
      • 1...Sdf5!
    • 1.Qxd3?
      • threat
        • 2.cxb4#
      • 1...Sd5
        • 2.Se4#
      • 1...Sc6
        • 2.Se4#
        • 2.Sb7#
      • 1...bxc3!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qxg1#
      • 1...Be3
        • 2.Qxe3#
      • 1...Bf2
        • 2.Qxf2#
      • 1...Bh2
        • 2.Qf2#
        • 2.Qe3#
      • 1...Bd4
        • 2.cxb4#
      • 1...Sc4
        • 2.Qxc7#
      • 1...Se4
        • 2.Qxc7#
      • 1...Sdf5
        • 2.Qxc7#
      • 1...Sb7
        • 2.Qxc7#
      • 1...Sf7
        • 2.Qxc7#
      • 1...Sdc8
        • 2.Qxc7#
      • 1...Sd5
        • 2.Se4#
      • 1...Sef5
        • 2.Qe5#
      • 1...Sc6
        • 2.Sb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::QAB(C)
    • B(a);N_GUARD::QAB(C),XB(a)
    • B(a);SBLOCK::P(B),XP(c)
    • S(j);N_SPINR(f),P_SPINS(g),SBLOCK::S(G)
    • S(j);P_SPINS(g),SBLOCK::S(I)
    • S(j);N_GUARD,P_SPINS(g)::R(E),XR(f)
  • Tries
    • Try
      • R(E);CHECK,XR(f)
      • Refutation
        • S(g);P_SPINS(g)
    • Try
      • Q(C);XP(b)
      • Threat
        • P(B),XP(c)
      • Vars
        • S(j);N_SPINR(f),P_SPINS(g)::S(G)
      • Refutation
        • P(c);XP(B)
  • Actual
    • Q(C);
    • Threat
      • QAB(C),XB(a)
    • Vars
      • B(a);N_GUARD::QAB(C),XB(a)
      • B(a);SBLOCK::P(B),XP(c)
      • S(g);OGATE,P_SPINS(j)::QAR2(C),XP(h)
      • S(g);N_SPINR(f),OGATE,P_SPINS(j)::QAR2(C),XP(h)
      • S(j);N_SPINR(f),P_SPINS(g),SBLOCK::S(G)
      • S(j);N_GUARD,N_SPINR(f),P_SPINS(g),S_CUTR(f)::QAR2(C)
      • S(j);P_SPINS(g),SBLOCK::S(I)
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