MESON Chess Problem Database

Problem Display
PID: 240414 (7k/1pp2p1P/1pRp1PbN/b5Np/4P2P/QR6/K1P5/8 w - - 0 1)

Shtern, David

Variantim, 2011

7k/1pp2p1P/1pRp1PbN/b5Np/4P2P/QR6/K1P5/8

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Qa8#
    • 1...Bd2
      • 2.Qa8#
    • 1...Bc3
      • 2.Qa8#
    • 1...Bb4
      • 2.Qa8#
    • 1...Bxe4
      • 2.Shxf7#
    • 1...Bf5
      • 2.Shxf7#
    • 1...Bxh7
      • 2.Sgxf7#
    • 1...d5
      • 2.Qf8#
  • Tries
    • 1.Rb5?
      • 1...Bxe4
        • 2.Shxf7#
      • 1...Bxh7
        • 2.Sgxf7#
      • 1...Be1
        • 2.Qa8#
      • 1...Bd2
        • 2.Qa8#
      • 1...Bc3
        • 2.Qa8#
      • 1...Bb4
        • 2.Qa8#
      • 1...Bf5
        • 2.Shxf7#
      • 1...d5
        • 2.Qf8#
      • 1...bxc6!
    • 1.Rxd6?
      • threat
        • 2.Rd8#
      • 1...Bxh7
        • 2.Sgxf7#
      • 1...Bb4
        • 2.Qa8#
      • 1...cxd6!
    • 1.Rxc7?
      • threat
        • 2.Rc8#
      • 1...Bxh7
        • 2.Sgxf7#
      • 1...Bf5
        • 2.Shxf7#
      • 1...b5!
    • 1.Qxd6?
      • threat
        • 2.Qf8#
        • 2.Qd8#
      • 1...Bxh7
        • 2.Sgxf7#
      • 1...cxd6
        • 2.Rc8#
      • 1...Bb4!
    • 1.Qxa5?
      • threat
        • 2.Qa8#
      • 1...Bxh7
        • 2.Sgxf7#
      • 1...Bf5
        • 2.Shxf7#
      • 1...bxa5!
  • Keys
    • 1.Rbxb6!
      • 1...Bxb6
        • 2.Qa8#
      • 1...Bxe4
        • 2.Shxf7#
      • 1...Bxh7
        • 2.Sgxf7#
      • 1...bxc6
        • 2.Rb8#
      • 1...cxb6
        • 2.Rc8#
      • 1...Be1
        • 2.Qa8#
      • 1...Bd2
        • 2.Qa8#
      • 1...Bc3
        • 2.Qa8#
      • 1...Bb4
        • 2.Qa8#
      • 1...Bf5
        • 2.Shxf7#
      • 1...d5
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(a);OGATE::QAB1(C)
    • B(e);N_GUARD,XP(E)::S(J),XP(h)
    • B(e);N_GUARD::S(J),XP(h)
    • B(e);N_GUARD,SBLOCK,XP(K)::S(G),XP(h)
    • P(d);OGATE::QAR2(C)
  • Tries
    • Try
      • R(D);
      • Vars
        • B(e);N_GUARD,XP(E)::S(J),XP(h)
        • B(e);N_GUARD,SBLOCK,XP(K)::S(G),XP(h)
        • B(a);OGATE::QAB1(C)
        • B(e);N_GUARD::S(J),XP(h)
        • P(d);OGATE::QAR2(C)
      • Refutation
        • P(f);XR(H)
    • Try
      • R(H);XP(d)
      • Threat
        • R(H)
      • Vars
        • B(e);N_GUARD,SBLOCK,XP(K)::S(G),XP(h)
        • B(a);OGATE::QAB1(C)
      • Refutation
        • P(g);XR(H)
    • Try
      • R(H);XP(g)
      • Threat
        • R(H)
      • Vars
        • B(e);N_GUARD,SBLOCK,XP(K)::S(G),XP(h)
        • B(e);N_GUARD::S(J),XP(h)
      • Refutation
        • P(c);
    • Try
      • Q(C);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • B(e);N_GUARD,SBLOCK,XP(K)::S(G),XP(h)
        • P(g);OGATE,XQ(C)::R(H)
      • Refutation
        • B(a);
    • Try
      • Q(C);XB(a)
      • Threat
        • QAB1(C)
      • Vars
        • B(e);N_GUARD,SBLOCK,XP(K)::S(G),XP(h)
        • B(e);N_GUARD::S(J),XP(h)
      • Refutation
        • P(c);XQ(C)
  • Actual
    • R(D);XP(c)
    • Vars
      • B(a);OGATE,XR(D)::QAB1(C)
      • B(e);N_GUARD,XP(E)::S(J),XP(h)
      • B(e);N_GUARD,SBLOCK,XP(K)::S(G),XP(h)
      • P(f);OGATE,XR(H)::R(D)
      • P(g);OGATE,XR(D)::R(H)
      • B(a);OGATE::QAB1(C)
      • B(e);N_GUARD::S(J),XP(h)
      • P(d);OGATE::QAR2(C)
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