MESON Chess Problem Database
Problem Display
PID: 251764 (Q7/3q4/1p3R2/3p1p2/3k1p1N/B1p5/B1KPRN2/b4bn1 w - - 0 1)
Rice, John Michael
Die Schwalbe, 2021
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Qa4+
- 2.Qxa4#
- 1...Qb5
- 2.Sxf5#
- 1...Qc6
- 2.Sxf5#
- 1...Qe6
- 2.Qa4#
- 1...Qc8
- 2.Qxd5#
- 1...Qe8
- 2.Sxf5#
- 2.Qxd5#
- 1...Qd6
- 2.Sxf5#
- 1...Qa7
- 2.Sxf5#
- 2.Qxd5#
- 1...Qb7
- 2.Sxf5#
- 2.Qa4#
- 1...Qc7
- 2.Sxf5#
- 2.Qxd5#
- 1...Qe7
- 2.Sxf5#
- 2.Qxd5#
- 1...Qf7
- 2.Sxf5#
- 2.Qa4#
- 1...Qg7
- 2.Sxf5#
- 2.Qxd5#
- 2.Qa4#
- 1...Qh7
- 2.Qxd5#
- 2.Qa4#
- 1...Qd8
- 2.Sxf5#
- 2.Qa4#
- 1...Sxe2
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sh3
- 2.Sf3#
- 1...Qa4+
- Tries
- 1.Rc6?
- threat
- 2.Qa4#
- 1...Qxc6
- 2.Sxf5#
- 1...Sxe2
- 2.Sf3#
- 1...Qd6
- 2.Sxf5#
- 1...Qa7
- 2.Sxf5#
- 1...Qe7
- 2.Sxf5#
- 1...b5
- 2.Bc5#
- 1...Bxe2!
- threat
- 1.Rd6?
- threat
- 2.Qxd5#
- 1...Qa4+
- 2.Qxa4#
- 1...Qxd6
- 2.Sxf5#
- 1...Qb5
- 2.Sxf5#
- 2.Qh8#
- 1...Qc6
- 2.Sxf5#
- 2.Qh8#
- 1...Qe6
- 2.Qa4#
- 1...Qb7
- 2.Sxf5#
- 2.Qa4#
- 1...Qf7
- 2.Qa4#
- 1...Bg2!
- threat
- 1.Rfe6?
- threat
- 2.Sxf5#
- 1...Qa4+
- 2.Qxa4#
- 1...Qxe6
- 2.Qa4#
- 1...Qf7
- 2.Qxd5#
- 2.Qa4#
- 1...Qh7
- 2.Qxd5#
- 2.Qa4#
- 1...Bh3!
- threat
- 1.Qc6?
- threat
- 2.Qxb6#
- 1...Qxc6
- 2.Sxf5#
- 1...Sxe2
- 2.Sf3#
- 1...Qe6
- 2.Qa4#
- 1...Qc8
- 2.Qxd5#
- 1...Qd6
- 2.Sxf5#
- 1...Qa7
- 2.Sxf5#
- 2.Qxd5#
- 1...Qb7
- 2.Sxf5#
- 2.Qa4#
- 1...Qc7
- 2.Sxf5#
- 2.Qxd5#
- 1...Qe7
- 2.Sxf5#
- 2.Qxd5#
- 1...Qd8
- 2.Sxf5#
- 2.Qa4#
- 1...b5
- 2.Bc5#
- 2.Qc5#
- 2.Qb6#
- 1...Bxe2!
- threat
- 1.Qa6?
- threat
- 2.Qd3#
- 2.Qxb6#
- 1...Qa4+
- 2.Qxa4#
- 1...Sxe2
- 2.Sf3#
- 1...Qb5
- 2.Sxf5#
- 1...Qc6
- 2.Sxf5#
- 2.Qd3#
- 1...Qe6
- 2.Qd3#
- 2.Qa4#
- 1...Qc8
- 2.Qd3#
- 1...Qd6
- 2.Sxf5#
- 2.Qd3#
- 1...Qa7
- 2.Sxf5#
- 2.Qd3#
- 1...Qb7
- 2.Sxf5#
- 2.Qd3#
- 2.Qa4#
- 1...Qc7
- 2.Sxf5#
- 2.Qd3#
- 1...Qe7
- 2.Sxf5#
- 2.Qd3#
- 1...Qd8
- 2.Sxf5#
- 2.Qd3#
- 2.Qa4#
- 1...b5
- 2.Qb6#
- 1...Bxe2!
- threat
- 1.Qe8?
- threat
- 2.Qe5#
- 1...Qa4+
- 2.Qxa4#
- 1...Qxe8
- 2.Sxf5#
- 1...Sxe2
- 2.Sf3#
- 1...Qe6
- 2.Qa4#
- 1...Qd6
- 2.Sxf5#
- 1...Qc7
- 2.Sxf5#
- 1...Qe7
- 2.Sxf5#
- 1...Sf3
- 2.Sxf3#
- 1...Bxe2!
- threat
- 1.Rc6?
- Keys
- 1.Rf7!
- threat
- 2.Qh8#
- 1...Qa4+
- 2.Qxa4#
- 1...Qxf7
- 2.Qa4#
- 1...Qc6
- 2.Sxf5#
- 1...Qe6
- 2.Qa4#
- 1...Qc8
- 2.Qxd5#
- 1...Qe8
- 2.Sxf5#
- 2.Qxd5#
- 1...Qd6
- 2.Sxf5#
- 1...Qc7
- 2.Sxf5#
- 2.Qxd5#
- 1...Qe7
- 2.Sxf5#
- 2.Qxd5#
- 1...Qd8
- 2.Sxf5#
- 2.Qa4#
- 1...Sf3
- 2.Sxf3#
- threat
- 1.Rf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 3
- Sets
- Q(j);CHECK,N_GUARD::QAR(I),XQ(j)
- Q(j);N_GUARD::S(G),XP(h)
- Q(j);N_GUARD::QAR(I)
- Q(j);N_GUARD::QAR1(I),XP(g)
- S(c);N_GUARD,XR(D)::S(G)
- S(c);N_GUARD::S(G),XS(c)
- S(c);N_GUARD::S(G)
- Tries
- Try
- R(H);
- Threat
- QAR(I)
- Vars
- Q(j);N_GUARD,XR(H)::S(G),XP(h)
- S(c);N_GUARD,XR(D)::S(G)
- Q(j);N_GUARD::S(G),XP(h)
- P(i);N_GUARD::B(F)
- Refutation
- B(b);XR(D)
- Try
- R(H);P_PINP(g)
- Threat
- QAR1(I),XP(g)
- Vars
- Q(j);CHECK,N_GUARD::QAR(I),XQ(j)
- Q(j);N_GUARD,N_SPINP(g),XR(H)::S(G),XP(h)
- Q(j);N_GUARD::QAR(I)
- Refutation
- B(b);
- Try
- R(H);
- Threat
- S(G),XP(h)
- Vars
- Q(j);CHECK,N_GUARD::QAR(I),XQ(j)
- Q(j);N_GUARD,XR(H)::QAR(I)
- Refutation
- B(b);
- Try
- Q(I);
- Threat
- QAB(I),XP(i)
- Vars
- Q(j);N_GUARD,XQ(I)::S(G),XP(h)
- S(c);N_GUARD,XR(D)::S(G)
- Q(j);N_GUARD::QAR(I)
- Q(j);N_GUARD::QAR1(I),XP(g)
- Q(j);N_GUARD::S(G),XP(h)
- Refutation
- B(b);XR(D)
- Try
- Q(I);
- Threat
- DUALS(2)
- Vars
- Q(j);CHECK,N_GUARD::QAR(I),XQ(j)
- S(c);N_GUARD,XR(D)::S(G)
- Q(j);N_GUARD::S(G),XP(h)
- Q(j);::QAR1(I)
- P(i);::QAB(I)
- Refutation
- B(b);XR(D)
- Try
- Q(I);
- Threat
- QAB1(I)
- Vars
- Q(j);CHECK,OGATE::QAR(I),XQ(j)
- Q(j);N_GUARD,XQ(I)::S(G),XP(h)
- S(c);N_GUARD,XR(D)::S(G)
- Q(j);OGATE::QAR(I)
- Q(j);N_GUARD::S(G),XP(h)
- S(c);N_GUARD::S(G),XS(c)
- Refutation
- B(b);XR(D)
- Try
- Actual
- R(H);
- Threat
- QAB(I)
- Vars
- Q(j);CHECK,N_GUARD::QAR(I),XQ(j)
- Q(j);N_GUARD,XR(H)::QAR(I)
- Q(j);N_GUARD::S(G),XP(h)
- Q(j);N_GUARD::QAR(I)
- Q(j);N_GUARD::QAR1(I),XP(g)
- S(c);N_GUARD::S(G),XS(c)
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).