MESON Chess Problem Database

Problem Display
PID: 102867 (4K3/b3N3/p1Q2p2/1p1P1B2/3k1B2/1P1r4/N2P4/1n1R1n2 w - - 0 1)

Hoffmann, Fritz

Canadian Chess Chat, 1984

4K3/b3N3/p1Q2p2/1p1P1B2/3k1B2/1P1r4/N2P4/1n1R1n2

#2

10 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.dxc3#
    • 1...Re3
      • 2.dxe3#
    • 1...Bc5
      • 2.Qxf6#
    • 1...Bb6
      • 2.Qxb6#
    • 1...Bb8
      • 2.Qb6#
    • 1...Sc3
      • 2.dxc3#
    • 1...Se3
      • 2.dxe3#
    • 1...b4
      • 2.Qc4#
  • Tries
    • 1.Sc1?
      • threat
        • 2.Se2#
      • 1...Re3
        • 2.dxe3#
      • 1...Sc3
        • 2.dxc3#
      • 1...Sg3!
    • 1.Sc3?
      • threat
        • 2.Se2#
      • 1...Rxc3
        • 2.dxc3#
      • 1...Sxc3
        • 2.dxc3#
      • 1...Re3
        • 2.dxe3#
      • 1...Sg3!
    • 1.Sb4?
      • threat
        • 2.Sc2#
      • 1...Rc3
        • 2.dxc3#
      • 1...Se3
        • 2.dxe3#
      • 1...Sa3!
    • 1.Qxb5?
      • threat
        • 2.Sc6#
        • 2.Qc4#
        • 2.Qb4#
      • 1...Rxb3
        • 2.Sc6#
      • 1...Sbxd2
        • 2.Sc6#
      • 1...Sfxd2
        • 2.Sc6#
      • 1...Rc3
        • 2.dxc3#
      • 1...Re3
        • 2.Qc4#
        • 2.Qb4#
        • 2.dxe3#
      • 1...Bc5
        • 2.Qxd3#
        • 2.Qc4#
      • 1...Sa3
        • 2.Sc6#
      • 1...Se3
        • 2.Sc6#
        • 2.dxe3#
      • 1...a5
        • 2.Sc6#
        • 2.Qc4#
      • 1...axb5!
    • 1.Qd6?
      • threat
        • 2.Sc6#
        • 2.Qb4#
      • 1...Sbxd2
        • 2.Sc6#
      • 1...Sfxd2
        • 2.Sc6#
      • 1...Rc3
        • 2.dxc3#
      • 1...Re3
        • 2.Qb4#
        • 2.dxe3#
      • 1...Bc5
        • 2.Sc6#
        • 2.Qxf6#
      • 1...Sa3
        • 2.Sc6#
      • 1...Se3
        • 2.Sc6#
        • 2.dxe3#
      • 1...b4
        • 2.Sc6#
        • 2.Qxb4#
      • 1...a5
        • 2.Sc6#
      • 1...Rxb3!
  • Keys
    • 1.d6!
      • threat
        • 2.Qd5#
      • 1...Sc3
        • 2.dxc3#
      • 1...Se3
        • 2.dxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • R(c);OGATE::R(A)+P(C)DCHECK,XR(c)
    • R(c);OGATE,P_PINS(I)::R(A)+P(C)DCHECK,XR(c)
    • B(h);SBLOCK::QAB(H),XP(g)
    • B(h);N_GUARD::QAB(H),XB(h)
    • B(h);N_GUARD::QAB(H)
    • S(a);OGATE::P(C),XS(a)
    • S(b);OGATE::P(C),XS(b)
    • P(e);N_GUARD::QAR1(H)
  • Tries
    • Try
      • S(B);
      • Threat
        • S(B)
      • Vars
        • R(c);OGATE,P_PINS(I)::R(A)+P(C)DCHECK,XR(c)
        • S(a);OGATE::P(C),XS(a)
      • Refutation
        • S(b);
    • Try
      • S(B);
      • Threat
        • S(B)
      • Vars
        • R(c);OGATE,XS(B)::R(A)+P(C)DCHECK,XR(c)
        • S(a);OGATE,XS(B)::P(C),XS(a)
        • R(c);OGATE,P_PINS(I)::R(A)+P(C)DCHECK,XR(c)
      • Refutation
        • S(b);
    • Try
      • S(B);
      • Threat
        • S(B)
      • Vars
        • R(c);OGATE::R(A)+P(C)DCHECK,XR(c)
        • S(b);OGATE::P(C),XS(b)
      • Refutation
        • S(a);
    • Try
      • Q(H);XP(e)
      • Threat
        • DUALS(3)
      • Vars
        • R(c);XP(D)::S(I)
        • S(a);XP(C)::S(I)
        • S(b);XP(C)::S(I)
        • R(c);OGATE::R(A)+P(C)DCHECK,XR(c)
        • S(a);::S(I)
      • Refutation
        • P(f);XQ(H)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);XP(C)::S(I)
        • S(b);XP(C)::S(I)
        • R(c);OGATE::R(A)+P(C)DCHECK,XR(c)
        • S(a);::S(I)
        • P(f);::S(I)
      • Refutation
        • R(c);XP(D)
  • Actual
    • P(F);
    • Threat
      • QAR1(H)
    • Vars
      • S(a);OGATE::P(C),XS(a)
      • S(b);OGATE::P(C),XS(b)
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