MESON Chess Problem Database

Problem Display
PID: 51629 (4R3/r3nBB1/2b4b/1p6/1Q2p3/r2k4/P2N4/R3K1N1 w Q - 0 1)

Barrow, John Hugh

Chess Amateur (The), 1924

4R3/r3nBB1/2b4b/1p6/1Q2p3/r2k4/P2N4/R3K1N1

#2

9 + 8

5257 Chess Problems by J H Barrow 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Kc2
      • 2.Qb1#
    • 1...Rxa2
      • 2.Qc3#
      • 2.Qb3#
    • 1...Rb3
      • 2.Qxb3#
    • 1...Rc3
      • 2.Qxc3#
    • 1...R3a4
      • 2.Qc3#
      • 2.Qb3#
    • 1...R3a5
      • 2.Qc3#
      • 2.Qb3#
    • 1...R3a6
      • 2.Qc3#
      • 2.Qb3#
    • 1...Bd7
      • 2.Qxe4#
    • 1...Bxe8
      • 2.Qxe4#
    • 1...Bxd2+
      • 2.Qxd2#
    • 1...Be3
      • 2.Qb1#
    • 1...Sd5
      • 2.Qxe4#
    • 1...e3
      • 2.Qb1#
  • Tries
    • 1.Sf1?
      • threat
        • 2.Qb1#
      • 1...Bd2+
        • 2.Qxd2#
      • 1...Kc2
        • 2.Qb1#
      • 1...Rxa2
        • 2.Qc3#
        • 2.Qb3#
      • 1...Bxg7
        • 2.Qd2#
        • 2.0-0-0#
      • 1...Rb3
        • 2.Qxb3#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Sd5
        • 2.Qxe4#
      • 1...Bd5!
    • 1.Rd8+?
      • 1...Kc2
        • 2.Qb1#
        • 2.Qb2#
      • 1...Ke3
        • 2.Bxh6#
      • 1...Bd5
        • 2.Qxe4#
      • 1...Bd7
        • 2.Qxe4#
      • 1...Sd5
        • 2.Qxe4#
      • 1...Rd7!
    • 1.Qxa3+?
      • 1...Kc2
        • 2.Rc1#
        • 2.Qb3#
        • 2.Qc3#
      • 1...Rxa3!
    • 1.Qc4+?
      • 1...Ke3
        • 2.Bxh6#
      • 1...bxc4!
  • Keys
    • 1.Sb3!
      • threat
        • 2.Qc3#
      • 1...Bd2+
        • 2.Qxd2#
      • 1...Kc2
        • 2.Qc3#
      • 1...Ke3
        • 2.Qd2#
      • 1...Rxb3
        • 2.Qxb3#
      • 1...Bxg7
        • 2.Qd2#
      • 1...Sd5
        • 2.Qxe4#
      • 1...e3
        • 2.0-0-0#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • K(b);S_FLIGHT::QAB1(F)
    • R(a);N_GUARD::QAR2(F),XR(a)
    • R(a);N_GUARD::QAR1(F),XR(a)
    • B(e);N_GUARD::QAB1(F),XP(c)
    • B(e);N_GUARD,XR(I)::QAB1(F),XP(c)
    • B(f);CHECK,OGATE,XS(E)::QAR1(F),XB(f)
    • B(f);SBLOCK::QAB(F)
    • S(h);S_CUTB(e)::QAB1(F),XP(c)
    • P(c);SBLOCK::QAB(F)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB(F)
      • Vars
        • B(f);CHECK,N_GUARD::QAR1(F),XB(f)
        • K(b);S_FLIGHT::QAB1(F)
        • R(a);N_GUARD::QAR2(F),XR(a)
        • R(a);N_GUARD::QAR1(F),XR(a)
        • S(h);S_CUTB(e)::QAB1(F),XP(c)
      • Refutation
        • B(e);
    • Try
      • R(I);CHECK
      • Vars
        • K(b);P-FLIGHT::B(H),XB(f)
        • B(e);P_SPINB(e)::QAB1(F),XP(c)
        • S(h);P_SPINS(h)::QAB1(F),XP(c)
      • Refutation
        • R(g);P_SPINR(g)
    • Try
      • Q(F);CHECK,XR(a)
      • Refutation
        • R(g);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);P-FLIGHT::B(H),XB(f)
      • Refutation
        • P(d);XQ(F)
  • Actual
    • S(E);
    • Threat
      • QAR1(F)
    • Vars
      • B(f);CHECK,N_GUARD::QAR1(F),XB(f)
      • K(b);S_FLIGHT::QAR1(F)
      • K(b);P-FLIGHT::QAB1(F)
      • R(a);OGATE,XS(E)::QAR2(F),XR(a)
      • B(f);N_GUARD,XB(H)::QAR1(F)
      • S(h);S_CUTB(e)::QAB1(F),XP(c)
      • P(c);SBLOCK::0-0-0
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