MESON Chess Problem Database
Problem Display
PID: 207716 (4nQN1/p3P3/3k2p1/rR6/p2P2BP/4qpKP/2Rp1P1B/8 w - - 0 1)
Ellerman, Arnoldo
Il Problema, 1932
#2
12 + 9
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qxf2+
- 2.Kxf2#
- 1...Qf4+
- 2.Qxf4#
- 1...Qa3
- 2.Qf4#
- 1...Qb3
- 2.Qf4#
- 1...Qd3
- 2.Qf4#
- 1...Qe5+
- 2.dxe5#
- 1...Qxe7
- 2.Kxf3#
- 2.Qxe7#
- 1...Sf6
- 2.Qb8#
- 2.e8S#
- 1...Sc7
- 2.Qd8#
- 2.e8S#
- 1...Sg7
- 2.Qb8#
- 2.Qd8#
- 2.e8S#
- 1...Qxf2+
- Tries
- 1.Qf4+?
- 1...Qe5
- 2.Qxe5#
- 2.dxe5#
- 1...Qxf4+!
- 1...Qe5
- 1.Qf5?
- threat
- 2.Qd7#
- 2.Qc5#
- 2.Qd5#
- 1...Qxf2+
- 2.Kxf2#
- 1...Qf4+
- 2.Qxf4#
- 1...Qe5+
- 2.Qxe5#
- 2.dxe5#
- 1...Qxd4
- 2.Qe6#
- 2.Qd7#
- 1...Qxe7
- 2.Qc5#
- 2.Qd5#
- 1...Rxb5
- 2.Qd7#
- 1...Qc3
- 2.Qd7#
- 1...Qe6
- 2.Qxe6#
- 1...Qg5
- 2.Qe6#
- 2.Qd7#
- 1...Qa3
- 2.Qe6#
- 2.Qd7#
- 2.Qf4#
- 2.Qd5#
- 2.Qe5#
- 1...Qb3
- 2.Qd7#
- 2.Qf4#
- 2.Qc5#
- 2.Qe5#
- 1...Qe4
- 2.Qd7#
- 2.Qc5#
- 1...Sf6
- 2.Qc5#
- 1...Sc7
- 2.Qd7#
- 2.Qc5#
- 1...gxf5!
- threat
- 1.Qf6+?
- 1...Qe6
- 2.Qxe6#
- 1...Sxf6!
- 1...Qe6
- 1.Qxe8?
- threat
- 2.Rc6#
- 2.Qc6#
- 2.Qd7#
- 2.Qb8#
- 2.Qd8#
- 1...Qxf2+
- 2.Kxf2#
- 1...Qe5+
- 2.dxe5#
- 1...Qxe7
- 2.Rc6#
- 2.Qc6#
- 2.Qxe7#
- 1...Rxb5
- 2.Qc6#
- 2.Qd7#
- 2.Qd8#
- 1...Qc3
- 2.Qd7#
- 1...Qe4
- 2.Qd7#
- 2.Qb8#
- 2.Qd8#
- 1...Qe6
- 2.Rc6#
- 2.Qc6#
- 1...Ra6
- 2.Qd7#
- 2.Qb8#
- 2.Qd8#
- 1...Qf4+!
- threat
- 1.fxe3?
- threat
- 2.Kf2#
- 2.Kxf3#
- 2.Qf4#
- 1...d1Q
- 2.Kf2#
- 2.Qf4#
- 1...d1S
- 2.Kxf3#
- 2.Qf4#
- 1...d1B
- 2.Kf2#
- 2.Qf4#
- 1...Sf6
- 2.Kf2#
- 2.Kxf3#
- 2.Qxf6#
- 2.Qb8#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...f2
- 2.Kxf2#
- 2.Kg2#
- 2.Kf3#
- 2.Qf4#
- 1...g5
- 2.Kf2#
- 2.Kxf3#
- 1...Rxb5!
- threat
- 1.Qf4+?
- Keys
- 1.Qxf3!
- threat
- 2.Rc6#
- 1...Qxf2+
- 2.Kxf2#
- 1...Qf4+
- 2.Qxf4#
- 1...Qxf3+
- 2.Kxf3#
- 1...Qe5+
- 2.dxe5#
- 1...Qc3
- 2.Kg2#
- 1...Qe6
- 2.Qc6#
- 1...Qe4
- 2.Qa3#
- 1...Ra6
- 2.Rd5#
- threat
- 1.Qxf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 3
- Sets
- Q(b);CHECK,XP(B)::B(C)+K(D),XQ(b)
- Q(b);CHECK,N_GUARD::QAB(K),XQ(b)
- Q(b);N_GUARD::QAB(K)
- Q(b);CHECK,OGATE::P(F),XQ(b)
- Tries
- Try
- Q(K);CHECK
- Refutation
- Q(b);CHECK,XQ(K)
- Try
- Q(K);
- Threat
- DUALS(3)
- Vars
- Q(b);CHECK,XP(B)::B(C)+K(D),XQ(b)
- Q(b);CHECK,N_GUARD::QAB(K),XQ(b)
- R(e);XR(I)::QAR1(K)
- Q(b);::QAR1(K)
- Q(b);N_GUARD::QAR1(K),XQ(b)
- S(i);::QAB1(K)
- Refutation
- P(g);XQ(K)
- Try
- Q(K);CHECK
- Vars
- Q(b);N_GUARD,P_SPINQ(b)::QAR1(K),XQ(b)
- Refutation
- S(i);XQ(K)
- Try
- Q(K);XS(i)
- Threat
- DUALS(5)
- Vars
- Q(b);CHECK,XP(B)::B(C)+K(D),XQ(b)
- Q(b);CHECK,OGATE::P(F),XQ(b)
- Q(b);::QAR1(K)
- Refutation
- Q(b);CHECK
- Try
- P(B);XQ(b)
- Threat
- DUALS(3)
- Refutation
- R(e);XR(I)
- Try
- Actual
- Q(K);P_SPINQ(K),XP(c)
- Threat
- R1(A)
- Vars
- Q(b);CHECK,N_PINQ(K),XP(B)::B(C)+K(D),XQ(b)
- Q(b);CHECK,N_PINQ(K)::QAB(K),XQ(b)
- Q(b);CHECK,XQ(K)::B(C)+K(D),XQ(b)
- Q(b);CHECK,N_PINQ(K),OGATE::P(F),XQ(b)
- Q(b);N_GUARD::B(C)+K(D)
- Q(b);N_PINQ(K)::QAR1(K)
- Q(b);N_PINQ(K)::QAB(K)
- R(e);N_GUARD::R1(I)
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).