MESON Chess Problem Database

Problem Display
PID: 508 (2Q5/8/bpPpp3/pN1kn3/P3pP2/1R2Bp2/2R2p2/5K2 w - - 0 1)

Rice, John Michael

The Observer, 1957

2Q5/8/bpPpp3/pN1kn3/P3pP2/1R2Bp2/2R2p2/5K2

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb5+
      • 2.Rxb5#
    • 1...Bb7
      • 2.Sc7#
    • 1...Bxc8
      • 2.Sc7#
    • 1...Sd3
      • 2.Sc7#
    • 1...Sc4
      • 2.Sc3#
    • 1...Sxc6
      • 2.Qxc6#
  • Tries
    • 1.Rd3+?
      • 1...Sxd3
        • 2.Sc7#
      • 1...exd3!
    • 1.Rb4?
      • threat
        • 2.Rd4#
      • 1...Bxb5+
        • 2.Rxb5#
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Sc4
        • 2.Sc3#
      • 1...axb4!
    • 1.Qc7?
      • threat
        • 2.Qxd6#
      • 1...Bxb5+
        • 2.Rxb5#
      • 1...Sc4
        • 2.Sc3#
      • 1...Sf7!
  • Keys
    • 1.Rb1!
      • 1...Bxb5+
        • 2.Rxb5#
      • 1...Bxc8
        • 2.Sc7#
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Sg4
        • 2.Rd1#
      • 1...Bb7
        • 2.Sc7#
      • 1...Sd3
        • 2.Sc7#
      • 1...Sc4
        • 2.Sc3#
      • 1...Sg6
        • 2.Rd1#
      • 1...Sd7
        • 2.Rd1#
      • 1...Sf7
        • 2.Rd1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(g);CHECK,OGATE,XS(G)::R(C),XB(g)
    • B(g);N_PINS(G)::S(G)
    • B(g);N_PINS(G),XQ(I)::S(G)
    • S(f);N_PINS(G)::S(G)
    • S(f);N_PINS(G),SBLOCK::S(G)
    • S(f);OGATE,XP(H)::QAB1(I),XS(f)
  • Tries
    • Try
      • R(C);CHECK,N_SPINS(G)
      • Vars
        • S(f);XR(C)::S(G)
      • Refutation
        • P(c);XR(C)
    • Try
      • R(C);
      • Threat
        • R1(C)
      • Vars
        • B(g);CHECK,OGATE,XS(G)::R(C),XB(g)
        • S(f);OGATE,XP(H)::QAB1(I),XS(f)
        • S(f);N_PINS(G)::S(G)
      • Refutation
        • P(d);XR(C)
    • Try
      • Q(I);
      • Threat
        • QAR1(I),XP(i)
      • Vars
        • B(g);CHECK,OGATE,XS(G)::R(C),XB(g)
        • S(f);N_PINS(G),SBLOCK::S(G)
      • Refutation
        • S(f);
  • Actual
    • R(C);
    • Vars
      • B(g);CHECK,OGATE,XS(G)::R(C),XB(g)
      • B(g);N_PINS(G),XQ(I)::S(G)
      • S(f);OGATE,XP(H)::QAB1(I),XS(f)
      • S(f);N_GUARD::R(C)
      • B(g);N_PINS(G)::S(G)
      • S(f);N_PINS(G)::S(G)
      • S(f);N_PINS(G),SBLOCK::S(G)
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