MESON Chess Problem Database

Problem Display
PID: 168416 (2bK2nN/1Qn5/q1p1k1p1/2PR4/1P6/1P3P2/4B3/B2R4 w - - 0 1)

Petite, Efren

8th HM., Wola Gulowska, 2011

2bK2nN/1Qn5/q1p1k1p1/2PR4/1P6/1P3P2/4B3/B2R4

#2

11 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe2
      • 2.Qxc6#
      • 2.Qxc8#
    • 1...Qd3
      • 2.Qxc6#
    • 1...Qc4
      • 2.Qxc6#
      • 2.Qxc8#
    • 1...Qb5
      • 2.Qxc8#
    • 1...Qxa1
      • 2.Qxc6#
    • 1...Qa2
      • 2.Qxc6#
      • 2.Qxc8#
    • 1...Qa3
      • 2.Qxc6#
      • 2.Qxc8#
    • 1...Qa4
      • 2.Qxc8#
    • 1...Qa5
      • 2.Qxc6#
      • 2.Qxc8#
    • 1...Qb6
      • 2.Qxc8#
    • 1...Qa7
      • 2.Qxc6#
      • 2.Qxc8#
    • 1...Sb5
      • 2.Qf7#
    • 1...Sxd5
      • 2.Qf7#
    • 1...Sa8
      • 2.Qf7#
    • 1...Se8
      • 2.Qf7#
    • 1...Sf6
      • 2.Re5#
  • Tries
    • 1.Bc4?
      • threat
        • 2.Re1#
      • 1...Qxc4
        • 2.Qxc6#
        • 2.Qxc8#
      • 1...Qxa1
        • 2.Qxc6#
      • 1...Sxd5
        • 2.Qf7#
      • 1...Qa2
        • 2.Qxc6#
        • 2.Qxc8#
      • 1...Sf6
        • 2.Re5#
      • 1...cxd5!
    • 1.Re1?
      • threat
        • 2.Bc4#
      • 1...Qxe2
        • 2.Qxc6#
      • 1...Qxa1
        • 2.Qxc6#
      • 1...Sxd5
        • 2.Qf7#
      • 1...cxd5
        • 2.Bd3#
      • 1...Qd3
        • 2.Qxc6#
      • 1...Qc4
        • 2.Bxc4#
        • 2.Qxc6#
      • 1...Qa2
        • 2.Qxc6#
      • 1...Sf6
        • 2.Re5#
      • 1...Kxd5!
    • 1.Rg5?
      • threat
        • 2.Rd6#
      • 1...Sb5
        • 2.Bc4#
        • 2.Qf7#
      • 1...Sd5
        • 2.Qf7#
      • 1...Se8
        • 2.Qf7#
      • 1...Qd3+!
  • Keys
    • 1.Bd3!
      • threat
        • 2.Rd6#
      • 1...Kxd5
        • 2.Bc4#
      • 1...Qxd3
        • 2.Qxc6#
      • 1...Qxa1
        • 2.Qxc6#
      • 1...Sxd5
        • 2.Qf7#
      • 1...cxd5
        • 2.Re1#
      • 1...Sb5
        • 2.Qf7#
      • 1...Se8
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD,P_PINR(H)::QAR2(I),XP(b)
    • Q(a);N_GUARD::QAB(I),XB(f)
    • Q(a);N_GUARD,XB(A)::QAR2(I),XP(b)
    • S(e);OGATE::QAB1(I)
    • S(e);OGATE,XR(H)::QAB1(I)
    • S(g);SBLOCK::R1(H)
  • Tries
    • Try
      • B(C);
      • Threat
        • R(B)
      • Vars
        • Q(a);N_GUARD,XB(A)::QAR2(I),XP(b)
        • S(e);OGATE,P_SPINS(e),XR(H)::QAB1(I)
        • S(g);SBLOCK::B(C)+R(H),DCHECK
      • Refutation
        • P(b);P_SPINP(b),XR(H)
    • Try
      • R(B);
      • Threat
        • R(B)+B(C)
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a),XB(C)::QAR2(I),XP(b)
        • Q(a);N_GUARD,XB(A)::QAR2(I),XP(b)
        • S(e);OGATE,SBLOCK,XR(H)::QAB1(I)
        • P(b);XR(H)::R(B)+B(C)
        • Q(a);N_GUARD,P_PINR(H)::QAR2(I),XP(b)
        • Q(a);N_GUARD::QAR2(I),XP(b)
        • S(g);SBLOCK::R1(H)
      • Refutation
        • K(c);P_SPINP(b),S_FLIGHT,XR(H)
    • Try
      • R(H);
      • Threat
        • R1(B)
      • Vars
        • S(e);OGATE::QAB1(I)
      • Refutation
        • Q(a);CHECK
  • Actual
    • B(C);
    • Threat
      • R1(H)
    • Vars
      • K(c);OGATEB,P_SPINP(b),S_FLIGHT,XR(H)::R(B)+B(C),DCHECK
      • Q(a);N_GUARD,P_PINR(H),XB(C)::QAR2(I),XP(b)
      • Q(a);N_GUARD,XB(A)::QAR2(I),XP(b)
      • S(e);OGATE,SBLOCK,XR(H)::QAB1(I)
      • P(b);XR(H)::R(B)
      • S(e);OGATE::QAB1(I)
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