MESON Chess Problem Database
Problem Display
PID: 158748 (4r3/3QRp1b/3P1Kn1/1pR2p2/1P1k3N/2p4n/2P1B1NB/5q2 w - - 0 1)
di Scala, Pascal
Phenix, 1990
#2
11 + 10
SOLUTION
- SOUND
- Sets
- 1...Qxe2
- 2.Sxf5#
- 1...Qxg2
- 2.Sxf5#
- 1...Qa1
- 2.Sf3#
- 2.Sxf5#
- 1...Qb1
- 2.Sf3#
- 2.Sxf5#
- 1...Qc1
- 2.Sf3#
- 2.Sxf5#
- 1...Qd1
- 2.Sf3#
- 2.Sxf5#
- 1...Qe1
- 2.Sf3#
- 2.Sxf5#
- 1...Qg1
- 2.Sf3#
- 2.Sxf5#
- 1...Qh1
- 2.Sf3#
- 2.Sxf5#
- 1...Qf3
- 2.Sxf3#
- 1...Sf2
- 2.Sf3#
- 2.Sxf5#
- 1...Shf4
- 2.Sxf5#
- 1...f4
- 2.Sf5#
- 1...Qxe2
- Tries
- 1.Bg1+?
- 1...Qxg1
- 2.Sf3#
- 2.Sxf5#
- 1...Qf2
- 2.Sf3#
- 2.Sxf5#
- 1...Sf2
- 2.Sf3#
- 2.Sxf5#
- 1...Sxg1!
- 1...Qxg1
- 1.Be5+?
- 1...Ke4
- 2.Qc6#
- 2.Qb7#
- 1...Sxe5!
- 1...Ke4
- 1.Rc4+?
- 1...Kd5
- 2.Se3#
- 2.Qxb5#
- 2.Qc6#
- 2.Qb7#
- 1...bxc4!
- 1...Kd5
- 1.Qxb5?
- threat
- 2.Rc4#
- 2.Rd5#
- 2.Qd3#
- 2.Qc4#
- 1...Qxe2
- 2.Sxf5#
- 2.Rd5#
- 1...Qxg2
- 2.Sxf5#
- 2.Rc4#
- 2.Qd3#
- 2.Qc4#
- 1...Rxe7
- 2.Rc4#
- 2.Qd3#
- 2.Qc4#
- 1...Sxe7
- 2.Rc4#
- 2.Qd3#
- 2.Qc4#
- 1...Qd1
- 2.Sf3#
- 2.Sxf5#
- 2.Rc4#
- 2.Rd5#
- 2.Qc4#
- 1...Qf3
- 2.Sxf3#
- 2.Rc4#
- 2.Qc4#
- 1...Rc8
- 2.Rd5#
- 2.Qd3#
- 2.Qc4#
- 1...Sf2
- 2.Sf3#
- 2.Sxf5#
- 2.Rc4#
- 2.Rd5#
- 2.Qc4#
- 1...Shf4
- 2.Sxf5#
- 2.Rc4#
- 2.Qc4#
- 1...Sgf4
- 2.Rc4#
- 2.Qc4#
- 1...Se5!
- threat
- 1.Qc6?
- threat
- 2.Rd5#
- 2.Qd5#
- 1...Qxg2
- 2.Sxf5#
- 1...Rxe7
- 2.Qd5#
- 1...Sxe7
- 2.Be5#
- 1...Qf3
- 2.Sxf3#
- 1...Shf4
- 2.Sxf5#
- 1...Se5
- 2.Bxe5#
- 2.Qd5#
- 1...Sgf4!
- threat
- 1.Qe6?
- threat
- 2.Rd5#
- 2.Qd5#
- 2.Qe3#
- 1...Qxe2
- 2.Sxf5#
- 2.Qd5#
- 1...Qxg2
- 2.Sxf5#
- 2.Qe3#
- 1...Rxe7
- 2.Rd5#
- 2.Qd5#
- 1...Sxe7
- 2.Qe3#
- 2.Qe5#
- 1...Se5
- 2.Qd5#
- 2.Qxe5#
- 1...Sgf4
- 2.Qe3#
- 2.Qe5#
- 1...Qc1
- 2.Sf3#
- 2.Sxf5#
- 2.Rd5#
- 2.Qd5#
- 1...Qg1
- 2.Sf3#
- 2.Sxf5#
- 2.Rd5#
- 2.Qd5#
- 1...Qf2
- 2.Rd5#
- 2.Qd5#
- 1...Qf3
- 2.Sxf3#
- 1...Qf4
- 2.Rd5#
- 2.Qd5#
- 1...Shf4
- 2.Sxf5#
- 2.Qe3#
- 1...f4
- 2.Sf5#
- 2.Rd5#
- 2.Qd5#
- 2.Qe4#
- 1...fxe6!
- threat
- 1.Qb7?
- threat
- 2.Rd5#
- 2.Qd5#
- 1...Qxe2
- 2.Sxf5#
- 2.Qd5#
- 1...Qxg2
- 2.Sxf5#
- 1...Rxe7
- 2.Qd5#
- 1...Sxe7
- 2.Be5#
- 1...Qf3
- 2.Sxf3#
- 1...Shf4
- 2.Sxf5#
- 1...Se5
- 2.Bxe5#
- 2.Qd5#
- 1...Sgf4!
- threat
- 1.Bg1+?
- Keys
- 1.Qxf5!
- threat
- 2.Rd5#
- 1...Qxf5+
- 2.Sxf5#
- 1...Qxe2
- 2.Qd5#
- 1...Qxg2
- 2.Qd3#
- 1...Sxe7
- 2.Be5#
- 1...Qf3
- 2.Sxf3#
- 1...Shf4
- 2.Qe4#
- 1...Sgf4
- 2.Qe5#
- 1...Se5
- 2.Bxe5#
- threat
- 1.Qxf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- Q(a);N_GUARD,XB(B)::S(F),XP(f)
- Q(a);N_GUARD,XS(C)::S(F),XP(f)
- Q(a);N_GUARD::S(F),XQ(a)
- S(c);S_CUTQ(a)::S(F),XP(f)
- P(f);S_CUTQ(a)::S(F)
- Tries
- Try
- B(D);CHECK
- Refutation
- S(c);XB(D)
- Try
- B(D);CHECK
- Refutation
- S(g);XB(D)
- Try
- R(G);CHECK
- Refutation
- P(e);XR(G)
- Try
- Q(J);XP(e)
- Threat
- DUALS(4)
- Refutation
- S(g);
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- Q(a);N_GUARD,XS(C)::S(F),XP(f)
- R(j);XR(K)::QAR1(J)
- S(g);N_GUARD,XR(K)::B(D)
- Q(a);N_GUARD::S(F),XQ(a)
- S(c);S_CUTQ(a)::S(F),XP(f)
- Refutation
- S(g);
- Try
- Q(J);
- Threat
- DUALS(3)
- Vars
- Q(a);N_GUARD::S(F),XQ(a)
- Refutation
- P(h);XQ(J)
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- Q(a);N_GUARD,XS(C)::S(F),XP(f)
- R(j);XR(K)::QAR1(J)
- S(g);N_GUARD,XR(K)::B(D)
- Q(a);N_GUARD::S(F),XQ(a)
- S(c);S_CUTQ(a)::S(F),XP(f)
- Refutation
- S(g);
- Try
- Actual
- Q(J);P_SPINQ(J),XP(f)
- Threat
- R1(G)
- Vars
- Q(a);CHECK,XQ(J)::S(F),XQ(a)
- Q(a);N_PINQ(J),XB(B)::QAR1(J)
- Q(a);N_PINQ(J),XS(C)::QAR1(J)
- S(g);N_GUARD,XR(K)::B(D)
- Q(a);N_GUARD::S(F),XQ(a)
- S(c);N_PINQ(J)::QAR1(J)
- S(g);N_PINQ(J)::QAB1(J)
- S(g);N_GUARD::B(D),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).