MESON Chess Problem Database

Problem Display
PID: 67658 (2RKR1n1/n7/1B1p4/3k4/B1p5/8/3r1N1b/Qb6 w - - 0 1)

Barron, Philip

Chess, 1948

2RKR1n1/n7/1B1p4/3k4/B1p5/8/3r1N1b/Qb6

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Qd4#
    • 1...Rc2
      • 2.Qd4#
    • 1...Re2
      • 2.Qd4#
    • 1...Rxf2
      • 2.Qd4#
    • 1...Rd4
      • 2.Qxd4#
    • 1...Ba2
      • 2.Qh1#
    • 1...Bd3
      • 2.Qd4#
    • 1...Sc6+
      • 2.Bxc6#
    • 1...c3
      • 2.Bb3#
  • Tries
    • 1.Bxa7?
      • threat
        • 2.Bc6#
      • 1...c3
        • 2.Bb3#
      • 1...Se7!
    • 1.Qc3?
      • threat
        • 2.Qxc4#
      • 1...Sc6+
        • 2.Bxc6#
      • 1...Sxc8
        • 2.Qa5#
      • 1...Rc2
        • 2.Qd4#
        • 2.Qf3#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Ba2
        • 2.Qxd2#
        • 2.Qf3#
      • 1...Bd3
        • 2.Qd4#
      • 1...Se7!
  • Keys
    • 1.Bb5!
      • threat
        • 2.Bxc4#
      • 1...Sc6+
        • 2.Bxc6#
      • 1...Sxb5
        • 2.Qa8#
      • 1...Sxc8
        • 2.Qa8#
      • 1...Rc2
        • 2.Qd4#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Ba2
        • 2.Qh1#
      • 1...Bd3
        • 2.Qd4#
      • 1...c3
        • 2.Bc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(b);N_GUARD::QAR1(A)
    • R(b);N_GUARD,XS(B)::QAR1(A)
    • R(b);N_GUARD::QAR1(A),XR(b)
    • B(a);OGATE::QAB(A)
    • B(a);S_CUTR(b)::QAR1(A)
    • S(g);CHECK,N_GUARD::B(C),XS(g)
    • P(d);OGATEB::B(C)
  • Tries
    • Try
      • B(D);XS(g)
      • Threat
        • B(C)
      • Vars
        • P(d);OGATEB::B(C)
      • Refutation
        • S(h);
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(d)
      • Vars
        • S(g);CHECK,N_GUARD::B(C),XS(g)
        • S(g);N_GUARD,XR(E)::QAR(A)
        • R(b);N_GUARD::QAR1(A),XR(b)
        • B(a);S_CUTR(b)::QAR1(A)
      • Refutation
        • S(h);
  • Actual
    • B(C);
    • Threat
      • B(C),XP(d)
    • Vars
      • S(g);CHECK,N_GUARD::B(C),XS(g)
      • S(g);OGATE,XB(C)::QAB(A)
      • S(g);OGATE,XR(E)::QAB(A)
      • R(b);N_GUARD::QAR1(A)
      • R(b);N_GUARD::QAR1(A),XR(b)
      • B(a);OGATE::QAB(A)
      • B(a);S_CUTR(b)::QAR1(A)
      • P(d);::B(C)
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