MESON Chess Problem Database

Problem Display
PID: 84980 (r2R4/2n5/p2p2Q1/2pPk1pK/2P3p1/B1Nrp1Pp/1PN5/1B3qb1 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Revista Romana de Sah, 1985

r2R4/2n5/p2p2Q1/2pPk1pK/2P3p1/B1Nrp1Pp/1PN5/1B3qb1

#2

11 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe2
      • 2.Qxg5#
    • 1...Qg2
      • 2.Qxg5#
    • 1...Qxb1
      • 2.Qxg5#
    • 1...Qc1
      • 2.Qxg5#
    • 1...Qd1
      • 2.Qxg5#
    • 1...Qe1
      • 2.Qxg5#
    • 1...Qf5
      • 2.Qxd6#
    • 1...Qf6
      • 2.Qe4#
    • 1...Bf2
      • 2.Qxg5#
    • 1...Sb5
      • 2.Qe6#
    • 1...Se6
      • 2.Qxe6#
    • 1...Se8
      • 2.Qe6#
  • Tries
    • 1.Kxg5?
      • threat
        • 2.Qe4#
        • 2.Qxd6#
      • 1...Qf4+
        • 2.gxf4#
      • 1...Qf5+
        • 2.Qxf5#
      • 1...Qf6+
        • 2.Qxf6#
      • 1...Se6+
        • 2.Qxe6#
      • 1...Rxd5
        • 2.Qe4#
      • 1...Rxd8
        • 2.Qe4#
      • 1...Qg2
        • 2.Qf5#
        • 2.Qxd6#
        • 2.Qf6#
        • 2.Qg7#
      • 1...Qf3
        • 2.Qxd6#
      • 1...Qf8
        • 2.Qe4#
      • 1...Rd4
        • 2.Qxd6#
      • 1...Sb5
        • 2.Qe4#
        • 2.Qe8#
        • 2.Qe6#
      • 1...Se8
        • 2.Qe4#
        • 2.Qxe8#
        • 2.Qe6#
      • 1...Rxc3!
    • 1.Sb4?
      • threat
        • 2.Sc6#
      • 1...Kd4
        • 2.Qe4#
      • 1...cxb4!
    • 1.Re8+?
      • 1...Se6
        • 2.Rxe6#
        • 2.Qxe6#
      • 1...Sxe8
        • 2.Qe6#
      • 1...Rxe8!
    • 1.Qg7+?
      • 1...Kf5
        • 2.Qxg5#
      • 1...Qf6!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sc6#
      • 1...Kxd4
        • 2.Qe4#
      • 1...Rxd4
        • 2.Qxd6#
      • 1...cxd4
        • 2.Bxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 12
  • Sets
    • Q(a);N_GUARD::QAR2(J),XP(i)
    • Q(a);N_GUARD,XB(A)::QAR2(J),XP(i)
    • Q(a);SBLOCK::QAB1(J),XP(k)
    • Q(a);SBLOCK::QAR1(J)
    • B(b);S_CUTQ(a)::QAR2(J),XP(i)
    • S(l);N_GUARD::QAR1(J)
    • S(l);N_GUARD::QAR1(J),XS(l)
  • Tries
    • Try
      • K(I);P-FLIGHT,XP(i)
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);CHECK,OGATE::P(F),XQ(a)
        • Q(a);CHECK,N_GUARD::QAR1(J),XQ(a)
        • Q(a);CHECK,N_GUARD::QAB1(J),XQ(a)
        • S(l);CHECK,N_GUARD::QAR1(J),XS(l)
        • R(c);XP(H)::QAR1(J)
        • R(m);XR(K)::QAR1(J)
        • Q(a);::QAB1(J),XP(k)
        • Q(a);::QAR1(J)
        • R(c);::QAB1(J),XP(k)
      • Refutation
        • R(c);XS(E)
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • K(h);S_FLIGHT::QAR1(J)
      • Refutation
        • P(g);XS(C)
    • Try
      • R(K);CHECK
      • Vars
        • S(l);N_GUARD,XR(K)::QAR1(J)
      • Refutation
        • R(m);XR(K)
    • Try
      • Q(J);CHECK
      • Vars
        • K(h);P-FLIGHT::QAR1(J),XP(i)
      • Refutation
        • Q(a);P_SPINQ(a)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(h);S_FLIGHT,XS(C)::QAR1(J)
      • R(c);SBLOCK,XS(C)::QAB1(J),XP(k)
      • P(g);OGATE,SBLOCK,XS(C)::B(D),XP(k)
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