MESON Chess Problem Database

Problem Display
PID: 21354 (4RK2/8/1p1p1Q1p/1B1Np3/1P1kbb1R/q1p1N3/1P3r2/2n3B1 w - - 0 1)

Chandler, Guy Wills

Good Companions (May), 1918

4RK2/8/1p1p1Q1p/1B1Np3/1P1kbb1R/q1p1N3/1P3r2/2n3B1

#2

10 + 11

3132 The Good Companion Two-Mover 1922
3391 Het Half Pin Thema 1924
56 The Problemist 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.bxc3#
    • 1...Qa4
      • 2.bxc3#
    • 1...Qa5
      • 2.bxc3#
    • 1...Qa6
      • 2.bxc3#
    • 1...Qa7
      • 2.bxc3#
    • 1...Qa8
      • 2.bxc3#
    • 1...Sb3
      • 2.bxc3#
  • Tries
    • 1.Sc2+?
      • 1...Kxd5
        • 2.Qe6#
        • 2.Qf7#
      • 1...Bxc2!
    • 1.Sf5+?
      • 1...Kxd5
        • 2.Qxd6#
        • 2.Qe6#
        • 2.Qf7#
      • 1...Bxf5!
  • Keys
    • 1.Qxd6!
      • threat
        • 2.Qxb6#
      • 1...Bh2+
        • 2.Sf5#
      • 1...Bxe3+
        • 2.Sf6#
      • 1...Bg3+
        • 2.Sf5#
      • 1...Bg5+
        • 2.Sf5#
      • 1...Qxb4
        • 2.Qxb4#
      • 1...Bxd5
        • 2.Qxe5#
      • 1...Bb1
        • 2.Qxe5#
      • 1...Bh1
        • 2.Qxe5#
      • 1...Bc2
        • 2.Qxe5#
      • 1...Bg2
        • 2.Qxe5#
      • 1...Bd3
        • 2.Qxe5#
      • 1...Bf3
        • 2.Qxe5#
      • 1...Bf5
        • 2.Qxe5#
      • 1...Bg6
        • 2.Qxe5#
      • 1...Bh7
        • 2.Qxe5#
      • 1...Qa5
        • 2.bxc3#
      • 1...Qa6
        • 2.bxc3#
      • 1...Qa7
        • 2.bxc3#
      • 1...Sb3
        • 2.bxc3#
      • 1...Sd3
        • 2.Sc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 16
    • REMOVED MATES = 3
  • Sets
    • Q(c);N_GUARD::P(B),XP(d)
    • Q(c);N_GUARD,P_PINR(I)::P(B),XP(d)
    • S(a);S_CUTQ(c)::P(B),XP(d)
  • Tries
    • Try
      • S(C);CHECK,P_PINR(b)
      • Refutation
        • B(f);P_SPINB(g),XS(C)
    • Try
      • S(C);CHECK,P_PINR(b)
      • Refutation
        • B(f);P_SPINB(g),XS(C)
  • Actual
    • Q(H);N_PINP(h),XP(j)
    • Threat
      • QAB(H),XP(i)
    • Vars
      • B(g);CHECK,P_SPINB(f)::S(C)
      • B(g);CHECK,P_SPINB(f),SBLOCK,XS(C)::QAR(H)+S(G)
      • Q(c);OGATE,P_PINQ(H),XP(D)::QAR2(H),XQ(c)
      • B(f);P_SPINB(g),XS(G)::QAB1(H),XP(h)
      • B(f);P_SPINB(g)::QAB1(H),XP(h)
      • Q(c);N_GUARD::P(B),XP(d)
      • S(a);S_CUTQ(c)::P(B),XP(d)
      • S(a);S_CUTB(f)::S(C)
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