MESON Chess Problem Database

Problem Display
PID: 173649 (1Q1b4/3NN3/2p4r/1pP3P1/n1k2p1q/K2Rn1r1/2bPP3/3B2B1 w - - 0 1)

Boros, Sandor

Prize, Dortmunder Zeitung, 1938

1Q1b4/3NN3/2p4r/1pP3P1/n1k2p1q/K2Rn1r1/2bPP3/3B2B1

#2

11 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Qxf4#
    • 1...Qh3
      • 2.Qxf4#
    • 1...Qh5
      • 2.Qxf4#
    • 1...Bb1
      • 2.Bb3#
    • 1...Bb3
      • 2.Bxb3#
    • 1...Sxd1
      • 2.Se5#
    • 1...Sf1
      • 2.Se5#
    • 1...Sg2
      • 2.Se5#
    • 1...Sg4
      • 2.Qxf4#
    • 1...Sd5
      • 2.Se5#
    • 1...Sf5
      • 2.Se5#
    • 1...Sxc5
      • 2.Se5#
    • 1...b4+
      • 2.Qxb4#
  • Tries
    • 1.Sxc6?
      • threat
        • 2.Sce5#
        • 2.Rd4#
      • 1...b4+
        • 2.Qxb4#
      • 1...Qxg5
        • 2.Rd4#
      • 1...Rxg5
        • 2.Rd4#
      • 1...Bxd3
        • 2.Bb3#
      • 1...Sxd1
        • 2.Sce5#
        • 2.Sde5#
      • 1...Rd6
        • 2.Sce5#
      • 1...Re6
        • 2.Rd4#
      • 1...Bf6
        • 2.Sa5#
      • 1...Bc7
        • 2.Rd4#
      • 1...Sf1
        • 2.Sce5#
        • 2.Sde5#
      • 1...Sg2
        • 2.Sce5#
        • 2.Sde5#
      • 1...Sg4
        • 2.Qxf4#
      • 1...Sd5
        • 2.Sce5#
        • 2.Sde5#
      • 1...Sf5
        • 2.Sce5#
        • 2.Sde5#
      • 1...f3
        • 2.Sce5#
      • 1...Rxc6!
    • 1.Bxc2?
      • threat
        • 2.Bb3#
      • 1...b4+
        • 2.Qxb4#
      • 1...Sxc5
        • 2.Se5#
      • 1...Sxc2+!
    • 1.Rc3+?
      • 1...Kd4
        • 2.Qe5#
      • 1...Sxc3!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Rd4#
      • 1...b4+
        • 2.Qxb4#
      • 1...Bxd3
        • 2.Bb3#
      • 1...Sxd1
        • 2.Se5#
      • 1...Sxf5
        • 2.Se5#
      • 1...Rd6
        • 2.Sxd6#
      • 1...Bf6
        • 2.Sd6#
      • 1...Sf1
        • 2.Se5#
      • 1...Sg2
        • 2.Se5#
      • 1...Sg4
        • 2.Qxf4#
      • 1...Sd5
        • 2.Se5#
      • 1...f3
        • 2.Sxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • Q(g);N_GUARD::QAR(K),XP(f)
    • B(a);OGATE::B(A)
    • B(a);OGATE::B(A),XB(a)
    • S(b);P_PINR(F),XB(A)::S(I)
    • S(b);P_PINR(F)::S(I)
    • S(b);P_PINR(F),S_CUTQ(g)::QAR(K),XP(f)
    • S(d);SBLOCK,XP(G)::S(I)
    • P(h);CHECK,OGATE::QAR1(K),XP(h)
  • Tries
    • Try
      • S(J);XP(i)
      • Threat
        • DUALS(2)
      • Vars
        • P(h);CHECK,OGATE::QAR1(K),XP(h)
        • Q(g);XP(H)::R1(F)
        • R(c);XP(H)::R1(F)
        • B(a);OGATE,XR(F)::B(A)
        • R(j);::S(J)
        • R(j);::R1(F)
        • B(k);N_GUARD::S(J)
        • B(k);::R1(F)
        • S(b);P_PINR(F),S_CUTQ(g)::QAR(K),XP(f)
        • P(f);::S(J)
      • Refutation
        • R(j);XS(J)
    • Try
      • B(A);XB(a)
      • Threat
        • B(A)
      • Vars
        • P(h);CHECK,OGATE::QAR1(K),XP(h)
        • S(d);SBLOCK,XP(G)::S(I)
      • Refutation
        • S(b);CHECK,P_PINR(F),XB(A)
    • Try
      • R(F);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINS(b)::QAB1(K)
      • Refutation
        • S(d);XR(F)
  • Actual
    • S(J);
    • Threat
      • R1(F)
    • Vars
      • P(h);CHECK,OGATE::QAR1(K),XP(h)
      • B(a);OGATE,XR(F)::B(A)
      • S(b);P_PINR(F),XB(A)::S(I)
      • S(b);P_PINR(F),XS(J)::S(I)
      • R(j);N_GUARD::S(J),XR(j)
      • B(k);S_CUTR(j)::S(J)
      • S(b);P_PINR(F)::S(I)
      • S(b);P_PINR(F),S_CUTQ(g)::QAR(K),XP(f)
      • P(f);N_GUARD,S_CUTR(c)::S(J),XS(b)
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