MESON Chess Problem Database

Problem Display
PID: 87862 (8/1QB3K1/7N/1N1P2np/2BPk2r/1R3p2/1pn5/4r3 w - - 0 1)

Tura, Waldemar

Problemista, 1963

8/1QB3K1/7N/1N1P2np/2BPk2r/1R3p2/1pn5/4r3

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.d6#
    • 1...Se3
      • 2.Bd3#
    • 1...Se6+
      • 2.dxe6#
  • Tries
    • 1.Bg3?
      • threat
        • 2.d6#
      • 1...Se6+
        • 2.dxe6#
      • 1...Sxd4
        • 2.Sd6#
      • 1...Se3
        • 2.Bd3#
      • 1...Sb4!
    • 1.Be5?
      • threat
        • 2.Sd6#
        • 2.d6#
      • 1...Se6+
        • 2.dxe6#
      • 1...Se3
        • 2.Sc3#
        • 2.Sd6#
        • 2.Bd3#
      • 1...Sb4
        • 2.Sd6#
      • 1...Sf7
        • 2.d6#
      • 1...Sxd4!
    • 1.Rd3?
      • threat
        • 2.Sc3#
      • 1...Se6+
        • 2.dxe6#
      • 1...b1S!
    • 1.Qc6?
      • threat
        • 2.Qg6#
      • 1...Se6+
        • 2.Qxe6#
        • 2.dxe6#
      • 1...Rf4
        • 2.d6#
      • 1...Se3
        • 2.Bd3#
      • 1...Sxd4!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qg6#
      • 1...Se6+
        • 2.Qxe6#
      • 1...Sxd4
        • 2.Qxd4#
      • 1...Rf4
        • 2.Sd6#
      • 1...Se3
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(f);SBLOCK::QAB(G)+P(E)
    • S(c);SBLOCK::B(B)
    • S(g);CHECK,OGATE::QAB(G)+P(E),XS(g)
  • Tries
    • Try
      • B(H);
      • Threat
        • QAB(G)+P(E)
      • Vars
        • S(g);CHECK,OGATE::QAB(G)+P(E),XS(g)
        • S(c);SBLOCK,XP(C)::S(D)
        • S(c);SBLOCK::B(B)
      • Refutation
        • S(c);
    • Try
      • B(H);
      • Threat
        • DUALS(2)
      • Vars
        • S(g);CHECK,OGATE::QAB(G)+P(E),XS(g)
        • S(c);::S(D)
        • S(g);::QAB(G)+P(E)
      • Refutation
        • S(c);XP(C)
    • Try
      • R(A);
      • Threat
        • S(D)
      • Vars
        • S(g);CHECK,OGATE::QAB(G)+P(E),XS(g)
      • Refutation
        • P(b);
    • Try
      • Q(G);
      • Threat
        • QAB(G)
      • Vars
        • R(f);SBLOCK::QAB(G)+P(E)
        • S(c);SBLOCK::B(B)
      • Refutation
        • S(c);XP(C)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)
    • Vars
      • S(g);CHECK,N_GUARD::QAR2(G),XS(g)
      • S(c);OGATE,XP(C)::QAR1(G),XS(c)
      • R(f);SBLOCK::S(D)
      • S(c);SBLOCK::S(D)
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