MESON Chess Problem Database
Problem Display
PID: 262007 (7B/pNP1rN1n/2Q2n2/1P2q1Rr/1p1kB1R1/1p3p2/1P2bP1b/K7 w - - 0 1)
Somma, Francesco
Il Problema, 1932
#2
12 + 12
| 15601 | Albrecht-Leiss-Degener Collection | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Qg3
- 2.Qd5#
- 2.Qc5#
- 1...Qf4
- 2.Qd5#
- 1...Qxc7
- 2.Qd5#
- 1...Qxe4
- 2.Qd5#
- 1...Qc5
- 2.Qxc5#
- 1...Qd5
- 2.Qxd5#
- 1...Qe6
- 2.Qc5#
- 1...Sxe4
- 2.Qxe4#
- 1...Sxg4
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 2.Qc5#
- 1...Sd7
- 2.Qd5#
- 1...Se8
- 2.Qd5#
- 2.Qc5#
- 1...Sg8
- 2.Qd5#
- 2.Qc5#
- 1...Qg3
- Tries
- 1.Bb1+?
- 1...Qf4
- 2.Qd5#
- 2.Qc5#
- 1...Qe4
- 2.Qd5#
- 2.Qc5#
- 1...Se4
- 2.Rxe4#
- 2.Qxe4#
- 2.Qc5#
- 1...Sxg4
- 2.Qe4#
- 2.Qc5#
- 1...Bf4!
- 1...Qf4
- 1.Bc2+?
- 1...Qf4
- 2.Qd5#
- 2.Qc5#
- 1...Qe4
- 2.Qd5#
- 2.Qc5#
- 1...Se4
- 2.Rxe4#
- 2.Qxe4#
- 2.Qc5#
- 1...Sxg4
- 2.Qe4#
- 2.Qc5#
- 1...Bf4!
- 1...Qf4
- 1.Bd3+?
- 1...Qf4
- 2.Qd5#
- 2.Qc4#
- 2.Qd6#
- 1...Qe4
- 2.Qd5#
- 2.Qc4#
- 1...Bf4
- 2.Qc4#
- 1...Se4
- 2.Qxe4#
- 2.Qc4#
- 2.Qd6#
- 1...Sxg4
- 2.Qe4#
- 2.Qc4#
- 2.Qd6#
- 1...Kxd3!
- 1...Qf4
- 1.Bg6+?
- 1...Qf4
- 2.Qd5#
- 2.Qc5#
- 1...Qe4
- 2.Qd5#
- 1...Se4
- 2.Qxe4#
- 1...Sxg4
- 2.Qe4#
- 2.Qc5#
- 1...Bf4!
- 1...Qf4
- 1.Bxh7+?
- 1...Qf4
- 2.Qd5#
- 2.Qc5#
- 1...Qe4
- 2.Qd5#
- 1...Se4
- 2.Qxe4#
- 1...Sxg4
- 2.Qe4#
- 2.Qc5#
- 1...Bf4!
- 1...Qf4
- 1.Bxf6?
- threat
- 2.Qd5#
- 2.Qc5#
- 1...Rxc7
- 2.Qd5#
- 1...Bf4
- 2.Qd5#
- 1...Rd7
- 2.Qc5#
- 1...Bc4
- 2.Qc5#
- 1...Sxf6!
- threat
- 1.Qb6+?
- 1...Kc4
- 2.Sa5#
- 1...Qc5
- 2.Qxc5#
- 1...axb6!
- 1...Kc4
- 1.Qd6+?
- 1...Kc4
- 2.Bd3#
- 1...Qd5
- 2.Qxd5#
- 1...Sd5
- 2.Qc5#
- 2.Qxd5#
- 1...Qxd6!
- 1...Kc4
- 1.Bb1+?
- Keys
- 1.Sa5!
- threat
- 2.Sxb3#
- 1...Qxe4
- 2.Qd5#
- 1...Sxe4
- 2.Qd6#
- 1...Qc5
- 2.Qxc5#
- 1...Qd5
- 2.Qxd5#
- 1...Qe6
- 2.Qc5#
- 1...Bd1
- 2.Qc4#
- 1...Bc4
- 2.Qxc4#
- threat
- 1.Sa5!
This is a version
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 4
- Sets
- Q(g);N_GUARD,P_SPINS(i)::QAR1(H)
- Q(g);N_GUARD,P_SPINS(i),XP(J)::QAR1(H)
- Q(g);N_GUARD,P_SPINQ(g),P_SPINS(i),XB(D)::QAR1(H)
- Q(g);N_GUARD,P_SPINS(i)::QAB1(H),XQ(g)
- Q(g);N_GUARD,P_SPINS(i)::QAR1(H),XQ(g)
- Q(g);N_GUARD,P_SPINS(i)::QAB1(H)
- S(i);OGATE,P_SPINQ(g),P_SPINS(i),XB(D)::QAR1(H),XS(i)
- S(i);N_GUARD,P_SPINQ(g),XR(E)::QAR1(H)
- S(i);N_GUARD,P_SPINQ(g)::QAR1(H)
- Tries
- Try
- B(D);CHECK
- Refutation
- B(b);P_SPINB(b)
- Try
- B(D);CHECK
- Refutation
- B(b);P_SPINB(b)
- Try
- B(D);CHECK
- Vars
- B(b);P_SPINB(b)::QAR1(H)
- Refutation
- K(f);P-FLIGHT,P_PINP(B),XB(D)
- Try
- B(D);CHECK
- Vars
- Q(g);P_SPINQ(g),P_SPINS(i)::QAR1(H)
- S(i);N_GUARD,P_SPINQ(g),P_SPINS(i)::QAR1(H),XS(i)
- Refutation
- B(b);P_SPINB(b)
- Try
- B(D);CHECK,XS(l)
- Vars
- Q(g);P_SPINQ(g),P_SPINS(i)::QAR1(H)
- S(i);N_GUARD,P_SPINQ(g),P_SPINS(i)::QAR1(H),XS(i)
- Refutation
- B(b);P_SPINB(b)
- Try
- B(L);P_PINQ(g),XS(i)
- Threat
- DUALS(2)
- Vars
- R(k);XP(J)::QAR1(H)
- B(b);::QAR1(H)
- R(k);::QAB1(H)
- B(a);::QAB1(H)
- Refutation
- S(l);N_SPINQ(g),XB(L)
- Try
- Q(H);CHECK
- Vars
- K(f);P-FLIGHT,P_PINP(B),S_CUTP(j),S_CUTQ(g)::S(I)
- Q(g);N_GUARD,P_SPINQ(g),P_SPINS(i)::QAB1(H),XQ(g)
- Refutation
- P(j);XQ(H)
- Try
- Q(H);CHECK
- Vars
- K(f);P-FLIGHT,P_PINP(B)::R(E)+B(D),DCHECK
- Q(g);N_GUARD,P_SPINQ(g),P_SPINS(i)::QAR1(H),XQ(g)
- Refutation
- Q(g);P_SPINS(i),XQ(H)
- Try
- Actual
- S(I);
- Threat
- S(I),XP(c)
- Vars
- Q(g);N_GUARD,P_SPINQ(g),P_SPINS(i),XB(D)::QAR1(H)
- S(i);N_GUARD,P_SPINQ(g),P_SPINS(i),XB(D)::QAR2(H)
- Q(g);N_GUARD,P_SPINS(i)::QAB1(H),XQ(g)
- Q(g);N_GUARD,P_SPINS(i)::QAR1(H),XQ(g)
- Q(g);N_GUARD,P_SPINS(i)::QAB1(H)
- B(a);N_GUARD::QAR1(H)
- B(a);N_GUARD::QAR1(H),XB(a)
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).