MESON Chess Problem Database

Problem Display
PID: 260395 (6B1/4N3/p1r1p3/R1P1kNP1/Kp3p2/2qP4/2P1p1Pb/B1Q5 w - - 0 1)

Somma, Francesco

L'Italia Scacchistica, 1929

6B1/4N3/p1r1p3/R1P1kNP1/Kp3p2/2qP4/2P1p1Pb/B1Q5

#2

12 + 9

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa1+
      • 2.Qxa1#
    • 1...Qb2
      • 2.Bxb2#
      • 2.Qxb2#
    • 1...Qd4
      • 2.Bxd4#
    • 1...Rxc5
      • 2.Rxc5#
    • 1...Rb6
      • 2.cxb6#
    • 1...Rd6
      • 2.cxd6#
    • 1...Rc7
      • 2.c6#
    • 1...Rc8
      • 2.c6#
    • 1...e1Q
      • 2.Qxe1#
    • 1...e1S
      • 2.Qxe1#
    • 1...e1B
      • 2.Qxe1#
    • 1...e1R
      • 2.Qxe1#
    • 1...b3
      • 2.Bxc3#
    • 1...f3
      • 2.Qe3#
    • 1...exf5
      • 2.Sxc6#
  • Tries
    • 1.Sxc6+?
      • 1...Kd5
        • 2.Sfe7#
      • 1...Kxf5!
    • 1.g3?
      • threat
        • 2.Qxf4#
      • 1...Qxa1+
        • 2.Qxa1#
      • 1...fxg3
        • 2.Qe3#
      • 1...f3
        • 2.Qe3#
        • 2.Qf4#
      • 1...Bxg3!
  • Keys
    • 1.Qh1!
      • 1...Qxa1+
        • 2.Qxa1#
      • 1...Rxc5
        • 2.Rxc5#
      • 1...exf5
        • 2.Sxc6#
      • 1...f3
        • 2.Qxh2#
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...Bg1
        • 2.Qh8#
      • 1...Qb2
        • 2.Bxb2#
      • 1...Qd4
        • 2.Bxd4#
      • 1...Rb6
        • 2.cxb6#
      • 1...Rd6
        • 2.cxd6#
      • 1...Rc7
        • 2.c6#
      • 1...Rc8
        • 2.c6#
      • 1...Bg3
        • 2.Qh8#
      • 1...b3
        • 2.Bxc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(c);CHECK,N_SPINQ(c),OGATE,XB(A)::QAB(B),XQ(c)
    • Q(c);OGATE::B(A),XQ(c)
    • R(h);OGATE,P_SPINR(h),XP(H)::R(G),XR(h)
    • R(h);OGATE::R(G)+P(H),XR(h)
    • R(h);OGATE::R(G)+P(H)
    • P(a);OGATEB::QAR(B),XQ(a)
    • P(a);OGATEB::QAR(B),XS(a)
    • P(a);OGATEB::QAR(B),XB(a)
    • P(a);OGATEB::QAR(B),XR(a)
    • P(d);N_GUARD::B(A),XQ(c)
    • P(e);N_GUARD::QAR2(B)
    • P(i);SBLOCK,XS(I)::S(K),XR(h)
  • Tries
    • Try
      • S(K);CHECK,XR(h)
      • Vars
        • K(f);N_SPINQ(c),P-FLIGHT,P_SPINP(i)::S(I)
      • Refutation
        • K(f);N_SPINQ(c),P-FLIGHT,XS(I)
    • Try
      • P(D);
      • Threat
        • QAB1(B),XP(e)
      • Vars
        • Q(c);CHECK,N_SPINQ(c),OGATE,XB(A)::QAB(B),XQ(c)
        • P(e);N_GUARD,XP(D)::QAR2(B)
      • Refutation
        • B(b);XP(D)
  • Actual
    • Q(B);
    • Vars
      • Q(c);CHECK,N_SPINQ(c),OGATE,XB(A)::QAB(B),XQ(c)
      • R(h);OGATE,P_SPINR(h),XP(H)::R(G),XR(h)
      • P(i);SBLOCK,XS(I)::S(K),XR(h)
      • P(e);OGATEB::QAB(B),XB(b)
      • P(a);OGATEB::QAR(B),XQ(a)
      • P(a);OGATEB::QAR(B),XS(a)
      • P(a);OGATEB::QAR(B),XB(a)
      • P(a);OGATEB::QAR(B),XR(a)
      • B(b);OGATE::QAB(B)
      • Q(c);OGATEB::B(A),XQ(c)
      • Q(c);OGATE::B(A),XQ(c)
      • R(h);OGATE::R(G)+P(H),XR(h)
      • R(h);OGATE::R(G)+P(H)
      • P(d);N_GUARD::B(A),XQ(c)
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