MESON Chess Problem Database

Problem Display
PID: 18223 (1r1R4/b3Q3/8/N2PN3/2qk2B1/3P4/1PnB4/3R2K1 w - - 0 1)

Loewenton, Leon

Nestorescu, Virgil

1st HM., L'Italia Scacchistica, 1954

1r1R4/b3Q3/8/N2PN3/2qk2B1/3P4/1PnB4/3R2K1

#2

11 + 5

3105 FIDE Album (1945-1955) 1964
4764 Probleme si studii alese 1999
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Sac6#
    • 1...Qb3
      • 2.Sac6#
    • 1...Qxd3
      • 2.Sec6#
    • 1...Qxd5
      • 2.Sac6#
    • 1...Qc3
      • 2.bxc3#
    • 1...Qb4
      • 2.Sac6#
    • 1...Qc6
      • 2.Saxc6#
    • 1...Bc5
      • 2.Sac6#
  • Tries
    • 1.Sec6+?
      • 1...Kxd3+
        • 2.Be3#
      • 1...Qxc6!
    • 1.Bc3+?
      • 1...Qxc3
        • 2.Sf3#
      • 1...Ke3!
    • 1.Be3+?
      • 1...Sxe3
        • 2.Sf3#
      • 1...Kxe3!
    • 1.Rf1?
      • threat
        • 2.Rf4#
      • 1...Qxd3
        • 2.Sec6#
      • 1...Rxd8!
    • 1.Qxa7+?
      • 1...Kxe5
        • 2.Qg7#
      • 1...Qc5
        • 2.Sac6#
      • 1...Rb6!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Qe4#
      • 1...Kxd3+
        • 2.Be3#
      • 1...Kxd5+
        • 2.Sb6#
      • 1...Qxd3
        • 2.Qe5#
      • 1...Qxd5
        • 2.Bc3#

Anticipated by 147664(1929)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(b);N_GUARD::S(G)
    • Q(b);N_GUARD,SBLOCK,XP(E)::S(I)
    • Q(b);N_GUARD,P_SPINQ(b),XP(H)::S(G)
    • Q(b);OGATE::P(C),XQ(b)
    • Q(b);N_GUARD::S(G),XQ(b)
    • B(d);S_CUTQ(b)::S(G)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(c);CHECK,P-FLIGHT,XP(E)::R(A)+B(D)
      • Refutation
        • Q(b);XS(I)
    • Try
      • B(D);CHECK
      • Vars
        • Q(b);XB(D)::S(I)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • S(a);XB(D)::S(I)
      • Refutation
        • K(c);S_FLIGHT,XB(D)
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • Q(b);N_GUARD,SBLOCK,XP(E)::S(I)
      • Refutation
        • R(e);XR(K)
    • Try
      • Q(J);CHECK,XB(d)
      • Vars
        • K(c);OGATEB,S_FLIGHT,XS(I)::QAB(J)
        • Q(b);P_SPINQ(b)::S(G)
      • Refutation
        • R(e);P_SPINR(e)
  • Actual
    • S(I);
    • Threat
      • QAR1(J)
    • Vars
      • K(c);CHECK,P-FLIGHT,XP(E)::R(A)+B(D)
      • K(c);CHECK,P-FLIGHT,XP(H)::R(K)+S(I),DCHECK
      • Q(b);SBLOCK,XP(E)::QAB1(J)
      • Q(b);N_GUARD,SBLOCK,XP(H)::B(D)
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