MESON Chess Problem Database
Problem Display
PID: 262944 (2R1R1K1/6p1/p2P1PP1/1Npk4/1nr1Np1p/1nPp2P1/B3pbQ1/2q2r2 w - - 0 1)
Somma, Francesco
L'Echiquier de Paris, 1934
#2
12 + 14
| 15601 | Albrecht-Leiss-Degener Collection | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Qxc3
- 2.Sexc3#
- 1...Rd4
- 2.Rxc5#
- 1...Rxe4
- 2.Qxe4#
- 1...Sd4
- 2.Rxc5#
- 1...Sc6
- 2.Sc7#
- 1...gxf6
- 2.Sxf6#
- 1...Qxc3
- Tries
- 1.Sd2+?
- 1...Re4
- 2.Qxe4#
- 1...f3!
- 1...Re4
- 1.Sxf2+?
- 1...Re4
- 2.Qxe4#
- 1...f3!
- 1...Re4
- 1.Sxc5+?
- 1...Re4
- 2.Bxb3#
- 2.Qxe4#
- 1...f3!
- 1...Re4
- 1.Sg5+?
- 1...Re4
- 2.Qxe4#
- 1...f3!
- 1...Re4
- 1.Qh3?
- threat
- 2.Qf5#
- 2.Qe6#
- 1...Qxc3
- 2.Qe6#
- 1...Rxc3
- 2.Qe6#
- 1...Rd4
- 2.Rxc5#
- 2.Qe6#
- 1...Bd4
- 2.Qe6#
- 1...Sd4
- 2.Rxc5#
- 1...Sc6
- 2.Sc7#
- 2.Qe6#
- 1...Rxe4!
- threat
- 1.gxf4?
- threat
- 2.Re5#
- 2.Qg5#
- 1...Qxc3
- 2.Sexc3#
- 1...Rxc3
- 2.Sd2#
- 1...Rxe4
- 2.Qxe4#
- 1...gxf6
- 2.Sxf6#
- 1...Rd4
- 2.Rxc5#
- 1...Rg1
- 2.Re5#
- 1...Bg3
- 2.Re5#
- 1...Bd4
- 2.Sf2#
- 1...Sd4
- 2.Rxc5#
- 2.Re5#
- 1...Sc6
- 2.Sc7#
- 1...Qxf4!
- threat
- 1.d7?
- threat
- 2.d8Q#
- 2.d8R#
- 1...Qxc3
- 2.Sexc3#
- 2.d8Q#
- 2.d8R#
- 1...Rxe4
- 2.Qxe4#
- 1...Bxg3
- 2.d8Q#
- 2.d8R#
- 1...Sxa2
- 2.d8Q#
- 2.d8R#
- 1...fxg3
- 2.d8Q#
- 2.d8R#
- 1...hxg3
- 2.d8Q#
- 2.d8R#
- 1...axb5
- 2.d8Q#
- 2.d8R#
- 1...gxf6
- 2.Sxf6#
- 2.d8Q#
- 2.d8R#
- 1...Rd4
- 2.Rxc5#
- 1...e1Q
- 2.d8Q#
- 2.d8R#
- 1...e1S
- 2.d8Q#
- 2.d8R#
- 1...e1B
- 2.d8Q#
- 2.d8R#
- 1...e1R
- 2.d8Q#
- 2.d8R#
- 1...f3
- 2.d8Q#
- 2.d8R#
- 1...Qb2
- 2.d8Q#
- 2.d8R#
- 1...Qd2
- 2.d8Q#
- 2.d8R#
- 1...Qa3
- 2.d8Q#
- 2.d8R#
- 1...Qe3
- 2.d8Q#
- 2.d8R#
- 1...Qa1
- 2.d8Q#
- 2.d8R#
- 1...Qb1
- 2.d8Q#
- 2.d8R#
- 1...Qd1
- 2.d8Q#
- 2.d8R#
- 1...Qe1
- 2.d8Q#
- 2.d8R#
- 1...Qc2
- 2.d8Q#
- 2.d8R#
- 1...Rd1
- 2.d8Q#
- 2.d8R#
- 1...Re1
- 2.d8Q#
- 2.d8R#
- 1...Rg1
- 2.d8Q#
- 2.d8R#
- 1...Rh1
- 2.d8Q#
- 2.d8R#
- 1...Be1
- 2.d8Q#
- 2.d8R#
- 1...Bg1
- 2.d8Q#
- 2.d8R#
- 1...Be3
- 2.d8Q#
- 2.d8R#
- 1...Bd4
- 2.d8Q#
- 2.d8R#
- 1...Sa1
- 2.d8Q#
- 2.d8R#
- 1...Sd2
- 2.d8Q#
- 2.d8R#
- 1...Sd4
- 2.Rxc5#
- 2.d8Q#
- 2.d8R#
- 1...Sa5
- 2.d8Q#
- 2.d8R#
- 1...Sc2
- 2.d8Q#
- 2.d8R#
- 1...Sc6
- 2.Sc7#
- 1...d2
- 2.d8Q#
- 2.d8R#
- 1...h3
- 2.d8Q#
- 2.d8R#
- 1...a5
- 2.d8Q#
- 2.d8R#
- 1...Rxc3!
- threat
- 1.Sd2+?
- Keys
- 1.Qf3!
- threat
- 2.Qh5#
- 1...Qxc3
- 2.Sexc3#
- 1...Rxc3
- 2.Sd2#
- 1...Rxe4
- 2.Qxe4#
- 1...fxg3
- 2.Qf5#
- 1...gxf6
- 2.Sxf6#
- 1...Rd4
- 2.Rxc5#
- 1...Bd4
- 2.Sf2#
- 1...Sd4
- 2.Rxc5#
- 1...Sc6
- 2.Sc7#
- threat
- 1.Qf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- Q(a);XP(C)::QAB(B)+S(E),DCHECK,XQ(a)
- R(h);N_GUARD,P_SPINS(e),S_CUTB(d)::R1(J),XP(k)
- R(h);OGATE,P_SPINR(h),P_SPINS(e),XS(E)::QAB1(B),XR(h)
- S(e);N_GUARD,P_SPINR(h),S_CUTB(d)::R1(J),XP(k)
- S(g);SBLOCK::S(F)
- P(n);XP(H)::QAB(B)+S(E),DCHECK,XP(n)
- Tries
- Try
- S(E);CHECK
- Vars
- R(h);N_GUARD,P_SPINR(h),P_SPINS(e)::QAB1(B),XR(h)
- Refutation
- P(i);P_SPINP(i)
- Try
- S(E);CHECK,XB(d)
- Vars
- R(h);N_GUARD,P_SPINR(h),P_SPINS(e)::QAB1(B),XR(h)
- Refutation
- P(i);P_SPINP(i)
- Try
- S(E);CHECK,XP(k)
- Refutation
- P(i);P_SPINP(i)
- Try
- S(E);CHECK
- Vars
- R(h);N_GUARD,P_SPINR(h),P_SPINS(e)::QAB1(B),XR(h)
- Refutation
- P(i);P_SPINP(i)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- Q(a);XP(C)::QAB1(B)
- R(h);P_SPINS(e),XP(C)::QAB1(B)
- B(d);::QAB1(B)
- S(e);N_GUARD,P_SPINR(h),S_CUTB(d)::R1(J),XP(k)
- Refutation
- R(h);P_SPINS(e),XS(E)
- Try
- P(D);XP(i)
- Threat
- DUALS(2)
- Vars
- Q(a);XP(C)::QAB(B)+S(E),DCHECK,XQ(a)
- R(h);N_GUARD,P_SPINS(e),XP(C)::QAB(B)+S(E)
- R(h);OGATE,P_SPINR(h),P_SPINS(e),XS(E)::QAB1(B),XR(h)
- P(n);XP(H)::QAB(B)+S(E),DCHECK,XP(n)
- R(h);N_GUARD,P_SPINS(e),S_CUTB(d)::R1(J),XP(k)
- R(b);::R1(K)
- B(d);::R1(K)
- B(d);S_CUTR(h)::QAB(B)+S(E)
- S(g);SBLOCK::S(F)
- Refutation
- Q(a);XP(D)
- Try
- P(G);
- Threat
- P=Q
- Vars
- R(h);OGATE,P_SPINR(h),P_SPINS(e),XS(E)::QAB1(B),XR(h)
- B(d);XP(D)::P=Q
- S(g);XB(A)::P=Q
- P(i);XP(D)::P=Q
- P(j);XP(D)::P=Q
- P(m);XS(F)::P=Q
- R(h);N_GUARD,P_SPINS(e),S_CUTB(d)::R1(J),XP(k)
- P(c);::P=Q
- P(i);::P=Q
- Q(a);::P=Q
- R(b);::P=Q
- B(d);::P=Q
- S(e);P_SPINR(h)::P=Q
- S(g);::P=Q
- S(g);SBLOCK::S(F)
- P(f);::P=Q
- P(j);::P=Q
- P(m);::P=Q
- Refutation
- R(h);P_SPINS(e),XP(C)
- Try
- Actual
- Q(B);
- Threat
- QAR(B)
- Vars
- Q(a);XP(C)::QAB(B)+S(E),DCHECK,XQ(a)
- R(h);N_GUARD,P_SPINS(e),XP(C)::QAB(B)+S(E)
- R(h);OGATE,P_SPINR(h),P_SPINS(e),XS(E)::QAB1(B),XR(h)
- P(i);OGATE,XP(D)::QAR2(B)
- P(n);XP(H)::QAB(B)+S(E),DCHECK,XP(n)
- R(h);N_GUARD,P_SPINS(e),S_CUTB(d)::R1(J),XP(k)
- B(d);S_CUTR(h)::QAB(B)+S(E)
- S(e);N_GUARD,P_SPINR(h),S_CUTB(d)::R1(J),XP(k)
- S(g);SBLOCK::S(F)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).