MESON Chess Problem Database

Problem Display
PID: 222371 (1b6/4r3/3Q1p2/1N1pN3/3Pk1P1/1pR3K1/p1q2Bn1/1B6 w - - 0 1)

Somma, Francesco

Funkschach, 1926

1b6/4r3/3Q1p2/1N1pN3/3Pk1P1/1pR3K1/p1q2Bn1/1B6

#2

9 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3+
      • 2.Bxd3#
    • 1...Bxd6
      • 2.Sxd6#
    • 1...Se1
      • 2.Re3#
    • 1...Se3
      • 2.Rxe3#
    • 1...Sf4
      • 2.Re3#
    • 1...Sh4
      • 2.Re3#
    • 1...b2
      • 2.Bxc2#
    • 1...fxe5
      • 2.Qg6#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Sc5#
        • 2.Sxf6#
      • 1...Qd3+
        • 2.Bxd3#
      • 1...Bxd6+
        • 2.Sxd6#
      • 1...Re6
        • 2.Sc5#
      • 1...Rf7
        • 2.Sc5#
      • 1...Ba7
        • 2.Sxf6#
        • 2.Qxe7#
      • 1...f5
        • 2.Sc5#
        • 2.Sf6#
      • 1...Rxd7!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sc5#
      • 1...Qxd3+
        • 2.Bxd3#
      • 1...Qxf2+
        • 2.Sxf2#
      • 1...Bxd6+
        • 2.Sxd6#
      • 1...Qxc3
        • 2.Sxc3#
      • 1...Rc7
        • 2.Qe6#
      • 1...Ba7
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • Q(b);CHECK,OGATE::B(A),XQ(b)
    • B(i);P_PINS(H),XQ(I)::S(G),XB(i)
    • S(c);N_GUARD::R1(C)
    • S(c);N_GUARD::R1(C),XS(c)
    • P(d);N_GUARD::B(A),XQ(b)
    • P(g);OGATE,XS(H)::QAB(I)
  • Tries
    • Try
      • S(H);P_SPINQ(I)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,OGATE::B(A),XQ(b)
        • B(i);CHECK,XQ(I)::S(G),XB(i)
        • R(h);::S(H)
      • Refutation
        • R(h);XS(H)
  • Actual
    • S(H);N_PINQ(b),P_SPINQ(I)
    • Threat
      • S(H)
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XS(H)::B(A),XQ(b)
      • Q(b);CHECK,XB(B)::B(A)+S(H),DCHECK,XQ(b)
      • B(i);CHECK,XQ(I)::S(G),XB(i)
      • Q(b);P_PINS(H),XR(C)::S(G),XQ(b)
      • R(h);N_PINQ(I)::QAR2(I)
      • B(i);N_PINQ(I)::QAR(I),XR(h)
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