MESON Chess Problem Database
Problem Display
PID: 272076 (4q3/1pB5/b6n/R4N1p/pr2k3/b1QRp3/2P1K3/7n w - - 0 1)
Ling, John Francis
Rice, John Michael
The Problemist, 1957
#2
7 + 11
SOLUTION
- SOUND
- Sets
- 1...Qc6
- 2.Qe5#
- 1...Qg6
- 2.Qe5#
- 1...Qd7
- 2.Qe5#
- 1...Qf7
- 2.Qe5#
- 1...Qe5
- 2.Qxe5#
- 1...Qa8
- 2.Qe5#
- 1...Qb8
- 2.Qe5#
- 1...Qc8
- 2.Qe5#
- 1...Qd8
- 2.Qe5#
- 1...Qf8
- 2.Qe5#
- 1...Qg8
- 2.Qe5#
- 1...Rb1
- 2.Qd4#
- 1...Rb2
- 2.Qd4#
- 1...Rb3
- 2.Qd4#
- 1...Rc4
- 2.Rxe3#
- 1...Rd4
- 2.Qxd4#
- 1...Rb6
- 2.Qd4#
- 1...Bxd3+
- 2.Qxd3#
- 2.cxd3#
- 1...Bc4
- 2.Qd4#
- 1...Sf2
- 2.Sg3#
- 1...Sg3+
- 2.Sxg3#
- 1...Qc6
- Tries
- 1.Re5+?
- 1...Qxe5
- 2.Qxe5#
- 1...Kf4!
- 1...Qxe5
- 1.Qxb4+?
- 1...Bc4
- 2.Qxc4#
- 1...Bxb4!
- 1...Bc4
- 1.Qc4+?
- 1...Rxc4
- 2.Rxe3#
- 1...Bxc4!
- 1...Rxc4
- 1.Qc5?
- threat
- 2.Qxe3#
- 2.Qd5#
- 1...Bxd3+
- 2.cxd3#
- 1...Sg3+
- 2.Sxg3#
- 1...Sxf5
- 2.Qd5#
- 2.Qxf5#
- 1...Qe5
- 2.Qxe5#
- 1...Qc6
- 2.Qxe3#
- 2.Qe5#
- 1...Qd7
- 2.Qxe3#
- 2.Qe5#
- 1...Qf7
- 2.Qxe3#
- 2.Qe5#
- 1...Qe6
- 2.Qxe3#
- 1...Qd8
- 2.Qxe3#
- 2.Qe5#
- 1...Qg8
- 2.Qxe3#
- 2.Qe5#
- 1...Rd4
- 2.Qxd4#
- 1...Rb5
- 2.Rxe3#
- 2.Rd4#
- 1...Bc1
- 2.Qd5#
- 1...Bc4
- 2.Qxe3#
- 2.Qd4#
- 1...Bb5
- 2.Qd5#
- 1...Sg4
- 2.Qd5#
- 1...b5
- 2.Rxe3#
- 2.Qd5#
- 1...Qb5!
- threat
- 1.Re5+?
- Keys
- 1.Qf6!
- threat
- 2.Sd6#
- 1...Bxd3+
- 2.cxd3#
- 1...Sg3+
- 2.Sxg3#
- 1...Sxf5
- 2.Qxf5#
- 1...Qe5
- 2.Qxe5#
- 1...Qc6
- 2.Qe5#
- 1...Qd7
- 2.Qe5#
- 1...Qe6
- 2.Qxe6#
- 1...Qe7
- 2.Qxe7#
- 1...Qd8
- 2.Qe5#
- 2.Qe6#
- 1...Qf8
- 2.Qe5#
- 2.Qe6#
- 1...Rb1
- 2.Qd4#
- 1...Rb2
- 2.Qd4#
- 1...Rb3
- 2.Qd4#
- 1...Rc4
- 2.Rxe3#
- 1...Rd4
- 2.Qxd4#
- 1...Rb5
- 2.Rd4#
- 1...Rb6
- 2.Qd4#
- 1...Sf7
- 2.Qh4#
- threat
- 1.Qf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 10
- Sets
- Q(k);N_GUARD::QAR1(C)
- Q(k);N_GUARD::QAR1(C),XQ(k)
- R(e);N_GUARD::QAR1(C)
- R(e);N_GUARD,P_PINP(A)::QAR1(C)
- R(e);N_PINR(D)::R1(D),XP(c)
- R(e);N_GUARD::QAR1(C),XR(e)
- B(h);S_CUTR(e)::QAR1(C)
- S(a);N_GUARD::S(F)
- S(a);CHECK,N_GUARD::S(F),XS(a)
- Tries
- Try
- R(E);CHECK
- Vars
- Q(k);OGATE,XR(E)::QAR1(C),XQ(k)
- Refutation
- K(f);P-FLIGHT
- Try
- Q(C);CHECK,XR(e)
- Vars
- B(h);N_GUARD,P_SPINB(h)::QAR2(C),XB(h)
- Refutation
- B(b);XQ(C)
- Try
- Q(C);CHECK,N_SPINR(D)
- Vars
- R(e);XQ(C)::R1(D),XP(c)
- Refutation
- B(h);P_PINR(D),XQ(C)
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- B(h);CHECK,OGATE,XR(D)::P(A),XB(h)
- S(a);CHECK,N_GUARD::S(F),XS(a)
- Q(k);N_GUARD::QAR1(C),XQ(k)
- Q(k);::QAR1(C),XP(c)
- R(e);N_GUARD::QAR1(C),XR(e)
- B(b);::QAB1(C)
- B(h);::QAB1(C)
- S(i);::QAB1(C)
- Refutation
- Q(k);
- Try
- Actual
- Q(C);
- Threat
- S(F)
- Vars
- B(h);CHECK,OGATE,XR(D)::P(A),XB(h)
- S(a);CHECK,N_GUARD::S(F),XS(a)
- S(i);OGATE,XS(F)::QAB1(C),XS(i)
- Q(k);N_GUARD::QAR1(C),XQ(k)
- Q(k);N_GUARD::QAR1(C)
- Q(k);N_GUARD::QAR2(C),XQ(k)
- Q(k);N_GUARD::QAR(C),XQ(k)
- R(e);N_GUARD::QAR1(C)
- R(e);N_GUARD,P_PINP(A)::QAR1(C)
- R(e);N_PINR(D)::R1(D),XP(c)
- R(e);N_GUARD::QAR1(C),XR(e)
- R(e);N_PINR(D)::R1(D)
- S(i);N_GUARD::QAR(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).