MESON Chess Problem Database

Problem Display
PID: 249995 (1bq5/8/p7/3B2r1/N4p2/1PpkP1nN/KR1P2R1/2Q1n2b w - - 0 1)

Murashev, Pavel Aleksandrovich

Uralski Problemist, 2008

1bq5/8/p7/3B2r1/N4p2/1PpkP1nN/KR1P2R1/2Q1n2b

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxh3
      • 2.Sc5#
      • 2.Qxc3#
    • 1...Qg4
      • 2.Sc5#
      • 2.Qxc3#
    • 1...Qf5
      • 2.Sc5#
      • 2.Qxc3#
    • 1...Qe6
      • 2.Sc5#
      • 2.Qxc3#
    • 1...Qb7
      • 2.Sc5#
      • 2.Qxc3#
    • 1...Qd7
      • 2.Sc5#
      • 2.Qxc3#
    • 1...Qc5
      • 2.Sxc5#
    • 1...Qd8
      • 2.Sc5#
      • 2.Qxc3#
    • 1...Qe8
      • 2.Sc5#
      • 2.Qxc3#
    • 1...Qf8
      • 2.Qxc3#
    • 1...Qg8
      • 2.Sc5#
      • 2.Qxc3#
    • 1...Qh8
      • 2.Sc5#
    • 1...Re5
      • 2.Sxf4#
    • 1...Ba7
      • 2.Sxf4#
    • 1...Bc7
      • 2.Sc5#
      • 2.Qxc3#
    • 1...Sc2
      • 2.Qxc2#
    • 1...Sf3
      • 2.Qc2#
    • 1...Se2
      • 2.Sf2#
    • 1...cxb2
      • 2.Sxb2#
    • 1...cxd2
      • 2.Qxd2#
  • Tries
    • 1.Sxc3?
      • threat
        • 2.Sf2#
      • 1...Qxh3
        • 2.Bc4#
      • 1...Qxc3
        • 2.Qxc3#
      • 1...Se4
        • 2.Bxe4#
      • 1...fxe3!
    • 1.Bf3?
      • threat
        • 2.Sf2#
      • 1...Qxh3
        • 2.Qxc3#
      • 1...Sxf3
        • 2.Qc2#
      • 1...cxd2
        • 2.Qxd2#
      • 1...Se4
        • 2.Be2#
      • 1...fxe3!
    • 1.Qb1+?
      • 1...Sc2
        • 2.Qxc2#
      • 1...c2!
    • 1.Qxe1?
      • threat
        • 2.Sf2#
      • 1...Qxh3
        • 2.Sc5#
      • 1...fxe3
        • 2.Qxe3#
      • 1...Se4
        • 2.Qf1#
        • 2.Qe2#
      • 1...cxb2!
    • 1.dxc3?
      • threat
        • 2.Sf2#
        • 2.Qd2#
      • 1...Qxh3
        • 2.Sc5#
        • 2.Qd2#
      • 1...Qxc3
        • 2.Sf2#
        • 2.Qxc3#
      • 1...Rxd5
        • 2.Sf2#
      • 1...fxe3
        • 2.Qd1#
      • 1...Sc2
        • 2.Qd2#
      • 1...Sf3
        • 2.Sf2#
      • 1...Sf1
        • 2.Sf2#
      • 1...Se4!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Sf2#
      • 1...Qxh3
        • 2.Sc5#
      • 1...cxd2
        • 2.Qxd2#
      • 1...fxe3
        • 2.dxc3#
      • 1...Se4
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(j);N_GUARD::S(I),XQ(j)
    • Q(j);N_GUARD::QAR1(A),XP(c)
    • Q(j);N_GUARD::S(I)
    • R(g);S_CUTB(i)::S(H),XP(f)
    • B(i);N_GUARD::S(H),XP(f)
    • S(a);N_GUARD::QAB1(A),XS(a)
    • S(a);N_GUARD::QAB1(A)
    • S(e);SBLOCK::S(H)
    • P(c);XR(C)::S(I),XP(c)
    • P(c);OGATE,XP(D)::QAR1(A),XP(c)
  • Tries
    • Try
      • S(I);XP(c)
      • Threat
        • S(H)
      • Vars
        • Q(j);N_GUARD,XS(H)::B(J)
        • Q(j);OGATE,XS(I)::QAR1(A),XQ(j)
        • S(e);N_GUARD::B(J),XS(e)
      • Refutation
        • P(f);XP(G)
    • Try
      • B(J);
      • Threat
        • S(H)
      • Vars
        • Q(j);N_GUARD,XS(H)::QAR1(A),XP(c)
        • S(a);N_GUARD,XB(J)::QAB1(A)
        • P(c);OGATE,XP(D)::QAR1(A),XP(c)
        • S(e);N_GUARD,SBLOCK::B(J)
      • Refutation
        • P(f);XP(G)
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(A),XS(a)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(A);XS(a)
      • Threat
        • S(H)
      • Vars
        • Q(j);N_GUARD,XS(H)::S(I)
        • P(f);OGATE,XP(G)::QAR1(A),XP(f)
      • Refutation
        • P(c);XR(C)
    • Try
      • P(D);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • R(g);XB(J)::S(H)
        • P(f);SBLOCK,XP(G)::QAR2(A)
        • S(a);::QAR1(A)
        • S(a);::S(H)
        • S(e);::S(H)
      • Refutation
        • S(e);
  • Actual
    • Q(A);
    • Threat
      • S(H)
    • Vars
      • Q(j);N_GUARD,XS(H)::S(I)
      • P(c);OGATE,P_SPINP(c),XP(D)::QAR1(A),XP(c)
      • P(f);SBLOCK,XP(G)::QAR(A)+P(D),XP(c)
      • S(e);N_GUARD::QAB1(A)
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