MESON Chess Problem Database
Problem Display
PID: 152328 (8/6B1/8/1K3P2/4P3/1QR5/pN2P3/kq4rR w - - 0 1)
Dawson, Thomas Rayner
The Problemist, 1938
#2
9 + 4
| 15256 | TRD Scrapbook | 2014 |
SOLUTION
- SOUND
- Tries
- 1.Sa4?
- 1...Qd3+
- 2.Rxd3#
- 1...Qxb3+
- 2.Rxb3#
- 1...Qxe4
- 2.Rc1#
- 2.Qb2#
- 1...Rxh1
- 2.Rc1#
- 1...Rxg7
- 2.Qb2#
- 1...Qb2
- 2.Qxb2#
- 1...Qc2
- 2.Rxc2#
- 1...Qc1
- 2.Rxc1#
- 1...Qd1
- 2.Rc1#
- 2.Qb2#
- 1...Qe1
- 2.Rc1#
- 2.Qb2#
- 1...Qf1
- 2.Rc1#
- 2.Rg3#
- 2.Qb2#
- 1...Rc1
- 2.Rcxc1#
- 1...Re1
- 2.Rc1#
- 1...Rf1
- 2.Rc1#
- 1...Rg2
- 2.Rg3#
- 2.Qb2#
- 1...Rg3
- 2.Rxg3#
- 2.Qb2#
- 1...Rg4
- 2.Qb2#
- 1...Rg5
- 2.Qb2#
- 1...Rg6
- 2.Qb2#
- 1...Rd1!
- 1...Qd3+
- 1.Sc4?
- 1...Qxb3+
- 2.Rxb3#
- 1...Qxe4
- 2.Rc1#
- 2.Qb2#
- 1...Rxh1
- 2.Rc1#
- 1...Rxg7
- 2.Qb2#
- 1...Qb2
- 2.Qxb2#
- 1...Qc2
- 2.Rxc2#
- 1...Qd3
- 2.Rc1#
- 2.Rxd3#
- 2.Qb2#
- 1...Qc1
- 2.Rxc1#
- 1...Qd1
- 2.Rc1#
- 2.Qb2#
- 1...Qe1
- 2.Rc1#
- 2.Qb2#
- 1...Qf1
- 2.Rc1#
- 2.Rg3#
- 2.Qb2#
- 1...Rc1
- 2.Rcxc1#
- 1...Re1
- 2.Rc1#
- 1...Rf1
- 2.Rc1#
- 1...Rg2
- 2.Rg3#
- 2.Qb2#
- 1...Rg3
- 2.Rxg3#
- 2.Qb2#
- 1...Rg4
- 2.Qb2#
- 1...Rg5
- 2.Qb2#
- 1...Rg6
- 2.Qb2#
- 1...Rd1!
- 1...Qxb3+
- 1.Rxg1?
- 1...Qc1
- 2.Rgxc1#
- 2.Rcxc1#
- 1...Qd1
- 2.Rxd1#
- 1...Qe1
- 2.Rxe1#
- 1...Qf1
- 2.Rxf1#
- 1...Qxg1!
- 1...Qc1
- 1.Sa4?
- Keys
- 1.Sd3!
- 1...Qxd3+
- 2.Rxd3#
- 1...Qxb3+
- 2.Rxb3#
- 1...Rxh1
- 2.Rc1#
- 1...Rxg7
- 2.Qb2#
- 1...Qb2
- 2.Qxb2#
- 1...Qc2
- 2.Rxc2#
- 1...Qc1
- 2.Rxc1#
- 1...Qd1
- 2.Rc1#
- 2.Qb2#
- 1...Qe1
- 2.Rc1#
- 2.Qb2#
- 1...Qf1
- 2.Rc1#
- 2.Qb2#
- 1...Rc1
- 2.Rcxc1#
- 1...Rd1
- 2.Rc1#
- 1...Re1
- 2.Rc1#
- 1...Rf1
- 2.Rc1#
- 1...Rg2
- 2.Qb2#
- 1...Rg3
- 2.Qb2#
- 1...Rg4
- 2.Qb2#
- 1...Rg5
- 2.Qb2#
- 1...Rg6
- 2.Qb2#
- 1...Qxd3+
- 1.Sd3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 16
- REMOVED MATES = 0
- Sets
- Tries
- Try
- S(B);P_SPINQ(D)
- Vars
- Q(b);CHECK,N_GUARD,N_PINQ(D),P_SPINR(c)::B(I)+R(E),XQ(b)
- Q(b);CHECK,OGATE,P_SPINR(c),XQ(D)::B(I)+R(E),XQ(b)
- R(c);N_GUARD,XR(A)::B(I)+R(E)
- R(c);P_SPINQ(b),XB(I)::QAB1(D)
- Q(b);N_GUARD,P_SPINR(c)::QAB1(D),XQ(b)
- Q(b);N_GUARD,N_PINQ(D),P_SPINR(c)::B(I)+R(E),XQ(b)
- Q(b);N_PINQ(D)::B(I)+R(E),DCHECK,XQ(b)
- R(c);N_GUARD::B(I)+R(E),XR(c)
- R(c);N_GUARD::B(I)+R(E)
- R(c);P_SPINQ(b)::QAB1(D)
- R(c);P_PINP(H),P_SPINQ(b)::QAB1(D)
- Refutation
- R(c);
- Try
- S(B);P_SPINQ(D)
- Vars
- Q(b);CHECK,OGATE,P_SPINR(c),XQ(D)::B(I)+R(E),XQ(b)
- R(c);N_GUARD,XR(A)::B(I)+R(E)
- R(c);P_SPINQ(b),XB(I)::QAB1(D)
- Q(b);N_GUARD,P_SPINR(c)::QAB1(D),XQ(b)
- Q(b);N_GUARD,N_PINQ(D),P_SPINR(c)::B(I)+R(E),XQ(b)
- Q(b);N_PINQ(D)::B(I)+R(E),DCHECK,XQ(b)
- R(c);N_GUARD::B(I)+R(E),XR(c)
- R(c);N_GUARD::B(I)+R(E)
- R(c);P_SPINQ(b)::QAB1(D)
- R(c);P_PINP(H),P_SPINQ(b)::QAB1(D)
- Refutation
- R(c);
- Try
- R(A);P_PINQ(b),XR(c)
- Vars
- Q(b);OGATEB::R(A),XQ(b)
- Q(b);OGATEB,P_PINP(C)::R(A),XQ(b)
- Refutation
- Q(b);N_SPINQ(b),XR(A)
- Try
- Actual
- S(B);P_SPINQ(D)
- Vars
- Q(b);CHECK,N_PINQ(D),OGATE,P_SPINR(c),XS(B)::B(I)+R(E),XQ(b)
- Q(b);CHECK,OGATE,P_SPINR(c),XQ(D)::B(I)+R(E),XQ(b)
- R(c);N_GUARD,XR(A)::B(I)+R(E)
- R(c);P_SPINQ(b),XB(I)::QAB1(D)
- Q(b);N_GUARD,P_SPINR(c)::QAB1(D),XQ(b)
- Q(b);N_GUARD,N_PINQ(D),P_SPINR(c)::B(I)+R(E),XQ(b)
- Q(b);N_PINQ(D)::B(I)+R(E),DCHECK,XQ(b)
- R(c);N_GUARD::B(I)+R(E),XR(c)
- R(c);N_GUARD::B(I)+R(E)
- R(c);P_SPINQ(b)::QAB1(D)
- R(c);P_PINP(H),P_SPINQ(b)::QAB1(D)
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).