MESON Chess Problem Database
Problem Display
PID: 233877 (b3BB2/2p2P1r/Rqp1kNp1/1p2p1P1/1N4P1/1p3Q2/1r3P1p/1n5K w - - 0 1)
Ellerman, Arnoldo
Skakbladet, 1949
#2
11 + 13
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qxf2
- 2.Qd5#
- 1...Qe3
- 2.Qd5#
- 1...Qa5
- 2.Qd5#
- 1...Qa7
- 2.Qd5#
- 1...Qb7
- 2.Qd5#
- 1...Qb8
- 2.Qd5#
- 1...Ra2
- 2.Qxb3#
- 1...Re2
- 2.Qxb3#
- 1...Rxf2
- 2.Qxb3#
- 1...e4
- 2.Qxe4#
- 1...Qxf2
- Tries
- 1.Se4?
- threat
- 2.Qf6#
- 1...Rxf2
- 2.Qxb3#
- 1...Rxf7
- 2.Qxf7#
- 1...Qxf2!
- threat
- 1.Sfd5?
- threat
- 2.Qf6#
- 1...Qxf2
- 2.Sxc7#
- 1...Rxf7
- 2.Qxf7#
- 1...Rxf2!
- threat
- 1.Sh5?
- threat
- 2.Qf6#
- 1...Qxf2
- 2.Qd5#
- 1...Rxf2
- 2.Qxb3#
- 1...Rxf7
- 2.Qxf7#
- 1...c5!
- threat
- 1.Sxh7?
- threat
- 2.Qf6#
- 1...Qxf2
- 2.Qd5#
- 1...Rxf2
- 2.Qxb3#
- 1...c5!
- threat
- 1.Sg8?
- threat
- 2.Qf6#
- 1...Qxf2
- 2.Qd5#
- 1...Rxf2
- 2.Qxb3#
- 1...Rxf7
- 2.Qxf7#
- 1...c5!
- threat
- 1.Se4?
- Keys
- 1.Sd7!
- threat
- 2.Qf6#
- 1...Qxf2
- 2.Qd5#
- 1...Rxf2
- 2.Qxb3#
- 1...Rxf7
- 2.Qxf7#
- 1...c5
- 2.Sxc5#
- threat
- 1.Sd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 8
- Sets
- Q(g);P_SPINP(h),XP(B)::QAB1(C)
- Q(g);P_SPINP(h)::QAB1(C)
- R(b);N_GUARD::QAB(C),XP(d)
- R(b);N_GUARD,XP(B)::QAB(C),XP(d)
- P(f);OGATEB::QAR2(C),XP(f)
- Tries
- Try
- S(H);
- Threat
- QAR1(C)
- Vars
- R(b);N_GUARD,XP(B)::QAB(C),XP(d)
- R(l);OGATE,XP(I)::QAB1(C),XR(l)
- Refutation
- Q(g);P_SPINP(h),XP(B)
- Try
- S(H);
- Threat
- QAR1(C)
- Vars
- Q(g);N_GUARD,P_SPINP(h),XP(B)::S(H),XP(k)
- R(l);OGATE,XP(I)::QAB1(C),XR(l)
- Refutation
- R(b);XP(B)
- Try
- S(H);
- Threat
- QAR1(C)
- Vars
- Q(g);P_SPINP(h),XP(B)::QAB1(C)
- R(b);N_GUARD,XP(B)::QAB(C),XP(d)
- R(l);OGATE,XP(I)::QAB1(C),XR(l)
- Refutation
- P(h);P_PINQ(C),P_SPINQ(g)
- Try
- S(H);XR(l)
- Threat
- QAR1(C)
- Vars
- Q(g);P_SPINP(h),XP(B)::QAB1(C)
- R(b);N_GUARD,XP(B)::QAB(C),XP(d)
- Refutation
- P(h);P_PINQ(C),P_SPINQ(g)
- Try
- S(H);
- Threat
- QAR1(C)
- Vars
- Q(g);P_SPINP(h),XP(B)::QAB1(C)
- R(b);N_GUARD,XP(B)::QAB(C),XP(d)
- R(l);OGATE,XP(I)::QAB1(C),XR(l)
- Refutation
- P(h);P_PINQ(C),P_SPINQ(g)
- Try
- Actual
- S(H);
- Threat
- QAR1(C)
- Vars
- Q(g);P_SPINP(h),XP(B)::QAB1(C)
- R(b);N_GUARD,XP(B)::QAB(C),XP(d)
- R(l);OGATE,XP(I)::QAB1(C),XR(l)
- P(h);P_PINQ(C),P_SPINQ(g)::S(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).