MESON Chess Problem Database

Problem Display
PID: 55166 (3K2N1/4p2n/4pNp1/3pqk2/4pBR1/8/2Q5/5R2 w - - 0 1)

Mansfield, Comins

Arbeiter Zeitung, 1971

3K2N1/4p2n/4pNp1/3pqk2/4pBR1/8/2Q5/5R2

#2

7 + 8

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Bh2#
      • 2.Bg3#
      • 2.Bd6#
      • 2.Bc7#
      • 2.Bb8#
    • 1...Qd6+
      • 2.Bxd6#
    • 1...Qxf6
      • 2.Sh6#
    • 1...Qc7+
      • 2.Bxc7#
    • 1...Qb8+
      • 2.Bxb8#
    • 1...Sg5
      • 2.Rxg5#
    • 1...Sxf6
      • 2.Sh6#
      • 2.Rg5#
    • 1...Sf8
      • 2.Rg5#
    • 1...exf6
      • 2.Sh6#
  • Tries
    • 1.Qc7?
      • threat
        • 2.Bxe5#
        • 2.Qxe5#
      • 1...Qd6+
        • 2.Bxd6#
      • 1...Qxc7+
        • 2.Bxc7#
      • 1...Qxf4
        • 2.Rfxf4#
        • 2.Qxf4#
      • 1...Qxf6
        • 2.Sh6#
      • 1...Sxf6
        • 2.Sh6#
        • 2.Rg5#
      • 1...exf6
        • 2.Sh6#
      • 1...Qa1
        • 2.Bc1#
      • 1...Qb2
        • 2.Bd2#
      • 1...Qc3
        • 2.Be3#
      • 1...Qd4
        • 2.Be3#
      • 1...Sg5
        • 2.Rxg5#
        • 2.Qxe5#
      • 1...g5!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Bxe5#
      • 1...Qd6+
        • 2.Bxd6#
      • 1...Qc7+
        • 2.Bxc7#
      • 1...Qb8+
        • 2.Bxb8#
      • 1...Qxf4
        • 2.Qxf4#
      • 1...Qxf6
        • 2.Sh6#
      • 1...Sxf6
        • 2.Sh6#
        • 2.Rg5#
      • 1...exf6
        • 2.Sh6#
      • 1...g5
        • 2.Qxh7#
      • 1...Qa1
        • 2.Bc1#
      • 1...Qb2
        • 2.Bd2#
      • 1...Qc3
        • 2.Be3#
      • 1...Qd4
        • 2.Be3#
      • 1...Sg5
        • 2.Rxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • Q(c);CHECK,OGATE::R(A)+B(C),XQ(c)
    • Q(c);SBLOCK,XS(E)::S(G)
    • S(h);N_GUARD::R1(D),XS(h)
    • S(h);N_GUARD::R1(D)
    • P(g);SBLOCK,XS(E)::S(G)
  • Tries
    • Try
      • Q(B);N_PINP(a)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);CHECK,OGATE::R(A)+B(C),XQ(c)
        • Q(c);CHECK,OGATE,XQ(B)::R(A)+B(C),XQ(c)
        • Q(c);SBLOCK,XS(E)::S(G)
        • P(g);SBLOCK,XS(E)::S(G)
        • Q(c);N_GUARD::R(A)+B(C)
      • Refutation
        • P(f);
  • Actual
    • Q(B);N_PINP(a)
    • Threat
      • R(A)+B(C),XQ(c)
    • Vars
      • Q(c);CHECK,OGATE::R(A)+B(C),XQ(c)
      • Q(c);OGATE,P_SPINQ(c),XB(C)::QAR1(B),XQ(c)
      • Q(c);SBLOCK,XS(E)::S(G)
      • P(g);SBLOCK,XS(E)::S(G)
      • P(f);OGATEB::QAB(B),XS(h)
      • Q(c);N_GUARD::R(A)+B(C)
      • S(h);N_GUARD::R1(D),XS(h)
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