MESON Chess Problem Database
Problem Display
PID: 2924 (8/4N3/5p2/2BBkppR/1p5p/bKp4P/1nP2Nn1/2Q5 w - - 0 1)
Booth, David (Jr)
British Deaf Times, 1911
#2
9 + 10
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Sd1
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Se1
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 1...Sf4
- 2.Qe3#
- 1...f4
- 2.Sg4#
- 1...g4
- 2.Sxg4#
- 2.Rxf5#
- 1...Sd1
- Tries
- 1.Ka2?
- 1...Se3
- 2.Qxe3#
- 1...Sd1
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Se1
- 2.Qe3#
- 1...Sf4
- 2.Qe3#
- 1...f4
- 2.Sg4#
- 1...g4
- 2.Sxg4#
- 2.Rxf5#
- 1...b3+!
- 1...Se3
- 1.Bf7?
- threat
- 2.Sc6#
- 2.Sg6#
- 1...Se3
- 2.Sg6#
- 2.Qxe3#
- 1...Sf4
- 2.Sc6#
- 2.Qe3#
- 1...f4!
- threat
- 1.Bg8?
- threat
- 2.Sc6#
- 2.Sg6#
- 1...Se3
- 2.Sg6#
- 2.Qxe3#
- 1...Sf4
- 2.Sc6#
- 2.Qe3#
- 1...f4!
- threat
- 1.Rxg5?
- threat
- 2.Sg4#
- 2.Rxf5#
- 1...Se3
- 2.Qxe3#
- 1...fxg5!
- threat
- 1.Rh6?
- 1...Se3
- 2.Qxe3#
- 1...Sd3
- 2.Sxd3#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Se1
- 2.Qe3#
- 1...Sf4
- 2.Qe3#
- 1...f4
- 2.Sg4#
- 1...g4!
- 1...Se3
- 1.Rh7?
- 1...Se3
- 2.Qxe3#
- 1...Sd3
- 2.Sxd3#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Se1
- 2.Qe3#
- 1...Sf4
- 2.Qe3#
- 1...f4
- 2.Sg4#
- 1...g4!
- 1...Se3
- 1.Rh8?
- 1...Se3
- 2.Qxe3#
- 1...Sd3
- 2.Sxd3#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Se1
- 2.Qe3#
- 1...Sf4
- 2.Qe3#
- 1...f4
- 2.Sg4#
- 1...g4!
- 1...Se3
- 1.Qd2?
- threat
- 2.Sc6#
- 2.Sg6#
- 2.Qd4#
- 1...Se3
- 2.Sg6#
- 2.Qxe3#
- 2.Qd4#
- 1...Sd3
- 2.Sxd3#
- 1...Sf4
- 2.Sc6#
- 2.Qe3#
- 2.Qd4#
- 1...f4
- 2.Sg4#
- 2.Qd4#
- 1...cxd2!
- threat
- 1.Qxg5?
- threat
- 2.Sg4#
- 2.Qxf5#
- 1...Se3
- 2.Qxe3#
- 1...fxg5!
- threat
- 1.Qd1?
- threat
- 2.Sg6#
- 2.Qd4#
- 1...Sxd1
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sf4
- 2.Sc6#
- 2.Qd4#
- 1...f4
- 2.Sg4#
- 2.Qd4#
- 1...Kf4!
- threat
- 1.Qe1+?
- 1...Kf4
- 2.Bd6#
- 1...Se3
- 2.Qxe3#
- 1...Sxe1!
- 1...Kf4
- 1.Ka2?
- Keys
- 1.Qh1!
- 1...Kf4
- 2.Qh2#
- 1...Sd3
- 2.Sxd3#
- 1...Sd1
- 2.Sd3#
- 1...Sa4
- 2.Sd3#
- 1...Sc4
- 2.Sd3#
- 1...Se1
- 2.Sg6#
- 1...Se3
- 2.Sg6#
- 1...Sf4
- 2.Sc6#
- 1...f4
- 2.Sg4#
- 1...g4
- 2.Rxf5#
- 1...Kf4
- 1.Qh1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 3
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(b);N_GUARD::QAR2(A)
- S(b);N_GUARD::QAR2(A),XS(b)
- P(h);N_GUARD,P_SPINP(i)::S(C)
- Tries
- Try
- K(D);S_FLIGHT
- Vars
- S(b);N_GUARD::QAR2(A),XS(b)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(b);N_GUARD::QAR2(A)
- P(h);N_GUARD,P_SPINP(i)::S(C)
- Refutation
- P(e);CHECK
- Try
- B(G);
- Threat
- DUALS(2)
- Refutation
- P(h);P_SPINP(i)
- Try
- B(G);
- Threat
- DUALS(2)
- Refutation
- P(h);P_SPINP(i)
- Try
- R(H);P_PINP(h),XP(i)
- Threat
- DUALS(2)
- Vars
- S(b);N_GUARD::QAR2(A),XS(b)
- Refutation
- P(j);N_SPINP(h),XR(H)
- Try
- R(H);
- Vars
- S(b);N_GUARD::QAR2(A),XS(b)
- S(a);N_GUARD::S(C),XS(a)
- S(a);N_GUARD::S(C)
- S(b);N_GUARD::QAR2(A)
- P(h);N_GUARD::S(C)
- Refutation
- P(i);
- Try
- R(H);
- Vars
- S(b);N_GUARD::QAR2(A),XS(b)
- S(a);N_GUARD::S(C),XS(a)
- S(a);N_GUARD::S(C)
- S(b);N_GUARD::QAR2(A)
- P(h);N_GUARD::S(C)
- Refutation
- P(i);
- Try
- R(H);
- Vars
- S(b);N_GUARD::QAR2(A),XS(b)
- S(a);N_GUARD::S(C),XS(a)
- S(a);N_GUARD::S(C)
- S(b);N_GUARD::QAR2(A)
- P(h);N_GUARD::S(C)
- Refutation
- P(i);
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- S(a);N_GUARD::S(C),XS(a)
- Refutation
- P(d);XQ(A)
- Try
- Q(A);P_PINP(h),XP(i)
- Threat
- DUALS(2)
- Vars
- S(b);N_GUARD::QAR2(A),XS(b)
- Refutation
- P(j);N_SPINP(h),XQ(A)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- S(a);N_GUARD,XQ(A)::S(C)
- S(a);N_GUARD::S(C),XS(a)
- Refutation
- K(g);S_FLIGHT
- Try
- Q(A);CHECK
- Vars
- K(g);S_FLIGHT::B(F)
- S(b);N_GUARD,P_SPINS(b)::QAR2(A),XS(b)
- Refutation
- S(b);XQ(A)
- Try
- Actual
- Q(A);
- Vars
- K(g);S_FLIGHT::QAB(A)
- S(a);N_GUARD::S(C),XS(a)
- S(a);N_GUARD::S(C)
- S(b);::S(I)
- S(b);SBLOCK::S(I)
- P(h);N_GUARD,P_SPINP(i),SBLOCK::S(C)
- P(i);OGATE,P_SPINP(h)::R1(H),XP(h)
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).