MESON Chess Problem Database
Problem Display
PID: 6300 (3r1r2/4P2R/Q2n1k2/4qB1P/3N1R2/3KpN2/8/B7 w - - 0 1)
Mari, Alberto
1/2 Prize, Pewarta Soerabaja, 1928
#2
10 + 6
| 20 | De Problemist | 1929 |
| 35 | L'Italia Scacchistica | 1930 |
SOLUTION
- SOUND
- Sets
- 1...Qxd4+
- 2.Bxd4#
- 1...Qe4+
- 2.Bxe4#
- 1...Qb5+
- 2.Sxb5#
- 1...Qxf5+
- 2.Rxf5#
- 1...Qe6
- 2.Sxe6#
- 1...Qxe7
- 2.Se6#
- 2.Bh3#
- 2.Be4#
- 2.Bg4#
- 2.Bg6#
- 2.Bd7#
- 2.Bc8#
- 1...Qxd4+
- Tries
- 1.Sc2?
- threat
- 2.Bxe5#
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bc8#
- 1...Qc3+
- 2.Bxc3#
- 1...Qd4+
- 2.Bxd4#
- 1...Qxa1
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bc8#
- 2.Qxa1#
- 1...Qb2
- 2.Bxb2#
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bc8#
- 1...Rd7
- 2.Bxe5#
- 2.Bh3#
- 2.Bg4#
- 2.Bxd7#
- 1...Rc8
- 2.Bxe5#
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bxc8#
- 2.Qxd6#
- 1...Rf7!
- threat
- 1.Se2?
- threat
- 2.Bxe5#
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bc8#
- 1...Qc3+
- 2.Bxc3#
- 1...Qd4+
- 2.Bxd4#
- 1...Qxa1
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bc8#
- 2.Qxa1#
- 1...Qb2
- 2.Bxb2#
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bc8#
- 1...Rd7
- 2.Bxe5#
- 2.Bh3#
- 2.Bg4#
- 2.Bxd7#
- 1...Rc8
- 2.Bxe5#
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bxc8#
- 2.Qxd6#
- 1...Rf7!
- threat
- 1.Sb3?
- threat
- 2.Bxe5#
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bc8#
- 1...Qc3+
- 2.Bxc3#
- 1...Qd4+
- 2.Bxd4#
- 1...Qxa1
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bc8#
- 2.Qxa1#
- 1...Qb2
- 2.Bxb2#
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bc8#
- 1...Rd7
- 2.Bxe5#
- 2.Bh3#
- 2.Bg4#
- 2.Bxd7#
- 1...Rc8
- 2.Bxe5#
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bxc8#
- 2.Qxd6#
- 1...Rf7!
- threat
- 1.Sb5?
- threat
- 2.Bxe5#
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bc8#
- 1...Qc3+
- 2.Bxc3#
- 1...Qd4+
- 2.Bxd4#
- 1...Qxa1
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bc8#
- 2.Qxa1#
- 1...Qb2
- 2.Bxb2#
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bc8#
- 1...Rd7
- 2.Bxe5#
- 2.Bh3#
- 2.Bg4#
- 2.Bxd7#
- 1...Rc8
- 2.Bxe5#
- 2.Bh3#
- 2.Bg4#
- 2.Bd7#
- 2.Bxc8#
- 2.Qxd6#
- 1...Rf7!
- threat
- 1.Bh3+?
- 1...Qf5+
- 2.Rxf5#
- 1...Qxf4!
- 1...Qf5+
- 1.Be4+?
- 1...Qf5
- 2.Rxf5#
- 1...Qxf4!
- 1...Qf5
- 1.Bg4+?
- 1...Qf5+
- 2.Rxf5#
- 1...Qxf4!
- 1...Qf5+
- 1.Bg6+?
- 1...Qf5+
- 2.Rxf5#
- 1...Qxf4!
- 1...Qf5+
- 1.Bd7+?
- 1...Qf5+
- 2.Sxf5#
- 2.Rxf5#
- 1...Qxf4!
- 1...Qf5+
- 1.Bc8+?
- 1...Qf5+
- 2.Sxf5#
- 2.Rxf5#
- 1...Qxf4!
- 1...Qf5+
- 1.Qxd6+?
- 1...Qe6
- 2.Sc2#
- 2.Se2#
- 2.Sb3#
- 2.Sb5#
- 2.Sc6#
- 2.Sxe6#
- 2.Bh3#
- 2.Be4#
- 2.Bg4#
- 2.Bxe6#
- 2.Bg6#
- 2.Qxe6#
- 1...Rxd6
- 2.exf8Q#
- 2.exf8R#
- 1...Qxd6!
- 1...Qe6
- 1.exd8Q+?
- 1...Qe7
- 2.Sc2#
- 2.Se2#
- 2.Sb3#
- 2.Sb5#
- 2.Sc6#
- 2.Se6#
- 2.Bh3#
- 2.Be4#
- 2.Bg4#
- 2.Bg6#
- 2.Bd7#
- 2.Bc8#
- 2.Qxe7#
- 2.Qaxd6#
- 1...Rxd8!
- 1...Qe7
- 1.exd8B+?
- 1...Qe7
- 2.Sc2#
- 2.Se2#
- 2.Sb3#
- 2.Sb5#
- 2.Sc6#
- 2.Se6#
- 2.Bh3#
- 2.Be4#
- 2.Bg4#
- 2.Bg6#
- 2.Bd7#
- 2.Bc8#
- 2.Bxe7#
- 2.Qxd6#
- 1...Rxd8!
- 1...Qe7
- 1.Sc2?
- Keys
- 1.Sc6!
- threat
- 2.Bxe5#
- 1...Qc3+
- 2.Bxc3#
- 1...Qd4+
- 2.Bxd4#
- 1...Sc4+
- 2.Bd7#
- 1...Se4+
- 2.Bd7#
- 1...Sb5+
- 2.Bd7#
- 1...Sxf5+
- 2.Sxd8#
- 1...Sb7+
- 2.Bd7#
- 1...Sf7+
- 2.Bd7#
- 1...Sc8+
- 2.Bd7#
- 1...Se8+
- 2.Bd7#
- 2.exd8Q#
- 2.exd8B#
- 1...Qxa1
- 2.Qxa1#
- 1...Qb2
- 2.Bxb2#
- threat
- 1.Sc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 10
- REMOVED MATES = 4
- Sets
- Q(b);CHECK,OGATE,P_SPINQ(b),XS(D)::B(A),XQ(b)
- Q(b);CHECK,N_GUARD::R(E)+B(F),XQ(b)
- Q(b);CHECK::B(A)+S(D),XQ(b)
- Q(b);CHECK,OGATE,P_SPINQ(b),XB(F)::R1(E),XQ(b)
- Q(b);N_SPINS(c)::B(A)+S(D),XQ(b)
- Tries
- Try
- S(D);P_PINQ(b)
- Threat
- DUALS(5)
- Vars
- Q(b);CHECK,OGATEB::B(A),XQ(b)
- Refutation
- R(f);
- Try
- S(D);P_PINQ(b)
- Threat
- DUALS(5)
- Vars
- Q(b);CHECK,OGATEB::B(A),XQ(b)
- Refutation
- R(f);
- Try
- S(D);P_PINQ(b)
- Threat
- DUALS(5)
- Vars
- Q(b);CHECK,OGATEB::B(A),XQ(b)
- Refutation
- R(f);
- Try
- S(D);P_PINQ(b)
- Threat
- DUALS(5)
- Vars
- Q(b);CHECK,OGATEB::B(A),XQ(b)
- Refutation
- R(f);
- Try
- B(F);CHECK
- Vars
- Q(b);CHECK,N_GUARD,P_SPINQ(b)::R1(E),XQ(b)
- Refutation
- Q(b);XR(E)
- Try
- B(F);CHECK
- Vars
- Q(b);N_GUARD,P_PINB(F),P_SPINQ(b)::R1(E),XQ(b)
- Refutation
- Q(b);XR(E)
- Try
- B(F);CHECK
- Vars
- Q(b);CHECK,N_GUARD,P_SPINQ(b)::R1(E),XQ(b)
- Refutation
- Q(b);XR(E)
- Try
- B(F);CHECK
- Vars
- Q(b);CHECK,N_GUARD,P_SPINQ(b)::R1(E),XQ(b)
- Refutation
- Q(b);XR(E)
- Try
- B(F);CHECK
- Refutation
- Q(b);XR(E)
- Try
- B(F);CHECK
- Refutation
- Q(b);XR(E)
- Try
- Q(H);CHECK,XS(c)
- Vars
- R(e);P_PINS(D),XQ(H)::PXR(f)=Q
- Refutation
- Q(b);P_PINS(D),XQ(H)
- Try
- P(I);CHECK,XR(e)
- Refutation
- R(f);XQ(I)
- Try
- P(I);CHECK,XR(e)
- Refutation
- R(f);XB(I)
- Try
- Actual
- S(D);N_PINS(c),P_PINQ(b)
- Threat
- B(A),XQ(b)
- Vars
- Q(b);CHECK,OGATEB::B(A),XQ(b)
- S(c);CHECK,N_GUARD::R(E)+B(F)
- S(c);CHECK,P_SPINS(c),XB(F)::QAR(H)+S(D),XR(e)
- Q(b);N_SPINQ(b),OGATE,XB(A)::QAB(H),XQ(b)
- Q(b);OGATEB::B(A),XQ(b)
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).