MESON Chess Problem Database
Problem Display
PID: 145759 (5Bb1/3N4/4kPpK/R3N1Qn/B4nP1/5r1p/3qp1p1/8 w - - 0 1)
Mai, Guglielmo
Mai, Luigi
Magyar Sakkvilag, 1932
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Qxd7
- 2.Bxd7#
- 1...Sd3
- 2.Bb3#
- 1...Sd5
- 2.Sc5#
- 1...Sxf6
- 2.Qxf6#
- 1...Qxd7
- Tries
- 1.Bb3+?
- 1...Qd5
- 2.Sc5#
- 2.Ra6#
- 1...Sd5
- 2.Sc5#
- 2.Ra6#
- 1...Rxb3!
- 1...Qd5
- 1.Be7?
- threat
- 2.Sf8#
- 1...Qxd7
- 2.Bxd7#
- 1...Sxf6
- 2.Qxf6#
- 1...Qxa5!
- threat
- 1.Ra6+?
- 1...Qd6
- 2.Rxd6#
- 1...Kd5!
- 1...Qd6
- 1.Bb3+?
- Keys
- 1.f7!
- threat
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qxa5
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qxd7
- 2.Bxd7#
- 1...Bxf7
- 2.Qe7#
- 1...e1Q
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...e1S
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...e1B
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...e1R
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...g1Q
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...g1S
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...g1B
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...g1R
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qc1
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qe1
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qc3
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qe3
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qb4
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qd1
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qa2
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qb2
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qc2
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qd3
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qd4
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qd5
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qd6
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rf1
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rf2
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Ra3
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rb3
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rc3
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rd3
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Re3
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rg3
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Bh7
- 2.Qe7#
- 1...Sd3
- 2.Bb3#
- 1...Sd5
- 2.Sc5#
- 1...Sg3
- 2.Qf6#
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Sf6
- 2.Qxf6#
- 1...Sg7
- 2.Qf6#
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- 1...h2
- 2.Qe7#
- 2.fxg8Q#
- 2.fxg8B#
- threat
- 1.f7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- Q(a);OGATE,XS(H)::B(A),XQ(a)
- S(f);N_GUARD,P_PINQ(E),S_CUTQ(a),S_CUTR(d)::B(A)
- S(f);P_PINQ(E),SBLOCK::S(H)
- S(g);OGATE,XP(F)::QAR1(E),XS(g)
- Tries
- Try
- B(A);CHECK
- Refutation
- R(d);XB(A)
- Try
- B(I);
- Threat
- S(H)
- Vars
- Q(a);OGATE,XS(H)::B(A),XQ(a)
- S(g);OGATE,XP(F)::QAR1(E),XS(g)
- Refutation
- Q(a);XR(C)
- Try
- R(C);CHECK
- Vars
- Q(a);N_GUARD,P_SPINQ(a)::R1(C),XQ(a)
- Refutation
- K(h);S_FLIGHT
- Try
- Actual
- P(F);
- Threat
- DUALS(3)
- Vars
- Q(a);XR(C)::PXB(j)=Q
- Q(a);OGATE,XS(H)::B(A),XQ(a)
- B(j);XP(F)::QAR1(E)
- Q(a);::PXB(j)=Q
- B(j);::QAR1(E)
- S(f);N_GUARD,P_PINQ(E),S_CUTQ(a),S_CUTR(d)::B(A)
- S(f);P_PINQ(E),SBLOCK::S(H)
- S(g);N_GUARD::QAR1(E),XS(g)
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).