MESON Chess Problem Database

Problem Display
PID: 257535 (8/2N1p3/pP4Q1/2PRB3/n1k2K2/p1P5/1p1n4/1r1B1b2 w - - 0 1)

Labai, Zoltan

Svitek, Miroslav

Astafyeva-30 JT (Kudesnik), 2021

8/2N1p3/pP4Q1/2PRB3/n1k2K2/p1P5/1p1n4/1r1B1b2

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.Qd3#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Bh3
      • 2.Qd3#
    • 1...Se4
      • 2.Qxe4#
  • Tries
    • 1.Rd4+?
      • 1...Kxc3
        • 2.Sd5#
        • 2.Rxa4#
        • 2.Qc2#
      • 1...Kxc5!
    • 1.Qc2?
      • threat
        • 2.Qxa4#
      • 1...Sxc3
        • 2.Qxc3#
      • 1...Sxc5
        • 2.Rd4#
      • 1...Sb3
        • 2.Qxb3#
      • 1...Sxb6!
    • 1.Qg1?
      • threat
        • 2.Qd4#
      • 1...Sb3
        • 2.Qxf1#
      • 1...Sf3
        • 2.Qxf1#
      • 1...Rxd1!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qxa4#
      • 1...Sxc3
        • 2.Rd4#
      • 1...Sxc5
        • 2.Qxc5#
      • 1...Sxb6
        • 2.cxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(b);N_GUARD::QAB1(H)
    • B(b);N_GUARD::QAB1(H),XB(b)
    • S(d);N_GUARD::QAR2(H),XS(d)
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • K(g);P-FLIGHT,XP(D)
    • Try
      • Q(H);
      • Threat
        • QAR2(H),XS(f)
      • Vars
        • S(f);OGATE,P_SPINS(f),XP(B)::QAR1(H),XS(f)
        • S(f);SBLOCK,XP(D)::R1(E)
        • S(d);N_GUARD::QAB1(H),XS(d)
      • Refutation
        • S(f);XP(G)
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • S(d);N_GUARD::QAB(H),XB(b)
      • Refutation
        • R(a);XB(A)
  • Actual
    • Q(H);
    • Threat
      • QAR2(H),XS(f)
    • Vars
      • S(f);SBLOCK,XP(B)::R1(E)
      • S(f);OGATE,P_SPINS(f),XP(D)::QAR1(H),XS(f)
      • S(f);OGATE,XP(G)::QAR(H)+P(D),XS(f)
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