MESON Chess Problem Database

Problem Display
PID: 19294 (Q6n/2KN4/2n3r1/pR2P3/4k3/1p3R2/q1r1N1P1/1B6 w - - 0 1)

Toth, Julius

1st Prize, La Nau, 1929

Q6n/2KN4/2n3r1/pR2P3/4k3/1p3R2/q1r1N1P1/1B6

#2

9 + 8

56 The Problemist 1937
3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg2
      • 2.Qxc6#
    • 1...Rg3
      • 2.Sf6#
      • 2.Qxc6#
    • 1...Rg4
      • 2.Sf6#
      • 2.Qxc6#
    • 1...Rg5
      • 2.Sf6#
      • 2.Qxc6#
    • 1...Rf6
      • 2.Sxf6#
    • 1...Rg7
      • 2.Qxc6#
    • 1...Rg8
      • 2.Sf6#
      • 2.Qxc6#
    • 1...b2
      • 2.Bxc2#
  • Tries
    • 1.Rb4+?
      • 1...Kd5
        • 2.Sf4#
      • 1...axb4!
    • 1.Qa7?
      • threat
        • 2.Sc3#
        • 2.Qe3#
      • 1...Sb4+
        • 2.Sc3#
      • 1...Sd4+
        • 2.Sc3#
      • 1...Sxe5+
        • 2.Sc3#
      • 1...Se7+
        • 2.Sc3#
      • 1...Sb8+
        • 2.Sc3#
      • 1...Sd8+
        • 2.Sc3#
      • 1...Qxb1
        • 2.Qe3#
      • 1...Rxg2
        • 2.Qe3#
      • 1...Qa1
        • 2.Qe3#
      • 1...Qb2
        • 2.Qe3#
      • 1...Sxa7+!
    • 1.e6?
      • threat
        • 2.Re5#
        • 2.Qxc6#
      • 1...Qxb1
        • 2.Re5#
      • 1...Rxg2
        • 2.Qxc6#
      • 1...Qa1
        • 2.Qxc6#
      • 1...Qb2
        • 2.Qxc6#
      • 1...Rg5
        • 2.Sf6#
      • 1...Sf7
        • 2.Qxc6#
      • 1...b2
        • 2.Bxc2#
        • 2.Re5#
      • 1...Rxe6!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qd5#
      • 1...Sb4+
        • 2.Qc4#
      • 1...Sd4+
        • 2.Sc3#
      • 1...Sxe5+
        • 2.Sc5#
      • 1...Sa7+
        • 2.Qc4#
      • 1...Se7+
        • 2.Qc4#
      • 1...Sb8+
        • 2.Qc4#
      • 1...Sd8+
        • 2.Qc4#
      • 1...Rxg8
        • 2.Sf6#
      • 1...Rd6
        • 2.Qg4#
      • 1...Re6
        • 2.Qg4#
      • 1...Sf7
        • 2.Qxg6#
      • 1...b2
        • 2.Bxc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 3
  • Sets
    • R(g);N_GUARD,XP(C)::QAB(I),XS(f)
    • R(g);N_GUARD::S(H),XR(g)
    • R(g);N_GUARD,P_PINS(H)::QAB(I),XS(f)
    • P(c);N_GUARD,S_CUTQ(a)::B(A),XR(b)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(d);N_SPINR(b),S_FLIGHT::S(B)
      • Refutation
        • P(e);XR(E)
    • Try
      • Q(I);N_PINS(f)
      • Threat
        • DUALS(2)
      • Vars
        • S(f);CHECK::S(B)
        • S(f);CHECK,XP(F)::S(B)
        • Q(a);N_SPINR(b),XB(A)::QAR1(I)
        • R(g);XP(C)::QAR1(I)
        • Q(a);::QAR1(I)
      • Refutation
        • S(f);CHECK,XQ(I)
    • Try
      • P(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);N_SPINR(b),XB(A)::R1(E)
        • R(g);XP(C)::QAB(I),XS(f)
        • Q(a);::QAB(I),XS(f)
        • R(g);N_GUARD::S(H)
        • S(h);::QAB(I),XS(f)
      • Refutation
        • R(g);XP(F)
  • Actual
    • Q(I);N_PINS(f)
    • Threat
      • QAB1(I)
    • Vars
      • S(f);CHECK,N_GUARD::QAR2(I)
      • S(f);CHECK,SBLOCK::S(B)
      • S(f);CHECK,SBLOCK,XP(F)::S(H)
      • R(g);N_GUARD,XQ(I)::S(H)
      • R(g);OGATE::QAR2(I)
      • S(h);N_GUARD::QAB(I),XR(g)
      • P(c);N_GUARD,S_CUTQ(a)::B(A),XR(b)
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