MESON Chess Problem Database

Problem Display
PID: 151592 (4NKB1/B2p4/3Q1pp1/R2Pn3/1p2k1P1/3N3R/2P2r1b/4q3 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Revista Romana de Sah, 1948

4NKB1/B2p4/3Q1pp1/R2Pn3/1p2k1P1/3N3R/2P2r1b/4q3

#2

11 + 9

15148 Sadier Collection 2014
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.Re3#
    • 1...Qa1
      • 2.Re3#
    • 1...Qb1
      • 2.Re3#
    • 1...Qd1
      • 2.Re3#
    • 1...Qf1
      • 2.Re3#
    • 1...Qg1
      • 2.Re3#
    • 1...Qh1
      • 2.Re3#
    • 1...Qe3
      • 2.Rxe3#
    • 1...Rxc2
      • 2.Sxf6#
    • 1...Rd2
      • 2.Sxf6#
    • 1...Re2
      • 2.Sxf6#
    • 1...Rg2
      • 2.Sxf6#
    • 1...Bf4
      • 2.Sxf6#
    • 1...Sxd3
      • 2.cxd3#
    • 1...Sf3
      • 2.Sxf6#
    • 1...f5
      • 2.Sf6#
  • Tries
    • 1.Sxf2+?
      • 1...Kf4
        • 2.Qxf6#
      • 1...Qxf2!
    • 1.Qxb4+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Qxb4+!
    • 1.Qe7?
      • threat
        • 2.Sd6#
      • 1...d6
        • 2.Sxd6#
      • 1...Bg3!
    • 1.Qe6?
      • threat
        • 2.Sd6#
      • 1...d6
        • 2.Sxd6#
      • 1...Bg3!
  • Keys
    • 1.Qxf6!
      • threat
        • 2.Sd6#
      • 1...Rxf6+
        • 2.Sxf6#
      • 1...Sxd3
        • 2.cxd3#
      • 1...Sxg4
        • 2.Sc5#
      • 1...Sf3
        • 2.Qxg6#
      • 1...Sc4
        • 2.Sc5#
      • 1...Sc6
        • 2.Sc5#
      • 1...Sf7
        • 2.Qd4#
      • 1...d6
        • 2.Sxd6#

Anticipated by 161090(1944)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 14
  • Sets
    • Q(a);N_GUARD::R1(C)
    • Q(a);N_GUARD::R1(C),XQ(a)
    • R(b);N_GUARD,XP(A)::S(I),XP(g)
    • R(b);N_GUARD::S(I),XP(g)
    • B(c);S_CUTR(b)::S(I),XP(g)
    • S(f);OGATE,XS(B)::P(A),XS(f)
    • S(f);S_CUTR(b)::S(I),XP(g)
    • P(g);S_CUTR(b)::S(I)
  • Tries
    • Try
      • S(B);CHECK,XR(b)
      • Vars
        • K(e);P-FLIGHT,P_SPINS(f)::QAR2(G),XP(g)
      • Refutation
        • Q(a);XS(B)
    • Try
      • Q(G);CHECK,XP(d)
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAR2(G),XS(f)
      • Refutation
        • Q(a);CHECK,XQ(G)
    • Try
      • Q(G);P_PINS(f)
      • Threat
        • S(I)
      • Vars
        • P(i);::S(I),XP(i)
      • Refutation
        • B(c);
    • Try
      • Q(G);P_PINS(f)
      • Threat
        • S(I)
      • Vars
        • P(i);::S(I),XP(i)
      • Refutation
        • B(c);
  • Actual
    • Q(G);P_SPINQ(G),XP(g)
    • Threat
      • S(I)
    • Vars
      • R(b);CHECK,XQ(G)::S(I),XR(b)
      • S(f);OGATE,XS(B)::P(A),XS(f)
      • S(f);XP(D)::S(B)
      • S(f);N_PINQ(G)::QAB(G),XP(h)
      • S(f);::S(B)
      • S(f);N_PINQ(G)::QAR1(G)
      • P(i);::S(I),XP(i)
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