MESON Chess Problem Database

Problem Display
PID: 104627 (8/8/B1n5/3b1N2/KPPqpb2/1Q2Pp2/1p1Pkr2/1R6 w - - 0 1)

Ursic, Andrej Anton

Budapest Chess Club, 1912

8/8/B1n5/3b1N2/KPPqpb2/1Q2Pp2/1p1Pkr2/1R6

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Qd1#
  • Tries
    • 1.Sg3+?
      • 1...Kxd2
        • 2.Rd1#
      • 1...Bxg3!
    • 1.Sxd4+?
      • 1...Kxd2
        • 2.Rd1#
      • 1...Sxd4!
    • 1.cxd5+?
      • 1...Kxd2
        • 2.Rd1#
      • 1...Qd3
        • 2.Qd1#
      • 1...Qc4!
  • Keys
    • 1.Qc2!
      • threat
        • 2.d3#
      • 1...Qxe3
        • 2.dxe3#
      • 1...Qxd2
        • 2.cxd5#
      • 1...Qxc4
        • 2.d4#
      • 1...Bxe3
        • 2.Sg3#
      • 1...Sxb4
        • 2.Sxd4#
      • 1...Qc3
        • 2.dxc3#
      • 1...Qd3
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • Q(e);SBLOCK::QAB1(C)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(b);P-FLIGHT,XP(B)::R1(A)
      • Refutation
        • B(g);XS(H)
    • Try
      • S(H);CHECK,XQ(e)
      • Vars
        • K(b);P-FLIGHT,XP(B)::R1(A)
      • Refutation
        • S(i);XS(H)
    • Try
      • P(G);CHECK,P_SPINP(F),XB(h)
      • Vars
        • K(b);P-FLIGHT,XP(B)::R1(A)
        • Q(e);N_PINP(F),P_SPINQ(e)::QAB1(C)
      • Refutation
        • Q(e);P_SPINQ(e)
  • Actual
    • Q(C);
    • Threat
      • QAR(C)+P(B)
    • Vars
      • Q(e);OGATE,XP(D)::QAR(C)+P(B),XQ(e)
      • Q(e);N_GUARD,P_SPINQ(e),XP(B)::B(I)+P(G),XB(h)
      • Q(e);OGATE,P_PINP(F),P_SPINQ(e),XP(G)::QAR(C)+P(B)
      • B(g);N_GUARD,XP(D)::S(H)
      • S(i);N_GUARD,XP(F)::S(H),XQ(e)
      • Q(e);OGATE::QAR(C)+P(B),XQ(e)
      • Q(e);SBLOCK::QAB1(C)
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