MESON Chess Problem Database
Problem Display
PID: 83766 (1Bqb4/1pr1pNN1/1Q4b1/K2B1p1R/1R1P1kp1/3P1p2/5P1P/8 w - - 0 1)
Ellerman, Arnoldo
Tijdschrift vd KNSB, 1949
#2
12 + 10
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qe6
- 2.Sxe6#
- 1...Qxb8
- 2.Se6#
- 1...Bxh5
- 2.Sxh5#
- 2.Qh6#
- 1...Bxf7
- 2.Qh6#
- 1...Bh7
- 2.Qh6#
- 1...g3
- 2.Rh4#
- 1...Qe6
- Tries
- 1.Sh8?
- threat
- 2.Sxg6#
- 1...Bxh5
- 2.Qh6#
- 1...Qe6
- 2.Sxe6#
- 1...Bf7
- 2.Qh6#
- 1...Bh7
- 2.Qh6#
- 1...Be8
- 2.Qh6#
- 1...g3!
- threat
- 1.Ba2?
- threat
- 2.d5#
- 1...Qxb8
- 2.Se6#
- 1...Bxf7
- 2.Qh6#
- 1...Qe6
- 2.Sxe6#
- 1...e5!
- threat
- 1.Bb3?
- threat
- 2.d5#
- 1...Qxb8
- 2.Se6#
- 1...Bxf7
- 2.Qh6#
- 1...Qe6
- 2.Sxe6#
- 1...e5!
- threat
- 1.Bc6?
- threat
- 2.d5#
- 1...e5
- 2.dxe5#
- 1...Qe6
- 2.Sxe6#
- 1...Bxf7!
- threat
- 1.Be6?
- threat
- 2.d5#
- 1...Qxe6
- 2.Sxe6#
- 1...Bxf7
- 2.Rxf5#
- 1...Qxb8!
- threat
- 1.Bxb7?
- threat
- 2.d5#
- 1...Qxb8
- 2.Se6#
- 1...Bxf7
- 2.Qh6#
- 1...Qe6
- 2.Sxe6#
- 1...e5!
- threat
- 1.Bxc7+?
- 1...Qxc7
- 2.Se6#
- 1...e5
- 2.Bxe5#
- 2.dxe5#
- 1...Bxc7!
- 1...Qxc7
- 1.Rxf5+?
- 1...Bxf5
- 2.Sh5#
- 2.Qh6#
- 1...Qxf5!
- 1...Bxf5
- 1.Qc5?
- threat
- 2.Qc1#
- 1...Qxb8
- 2.Se6#
- 1...g3
- 2.Rh4#
- 1...e5
- 2.dxe5#
- 1...Qe6
- 2.Sxe6#
- 1...b6+!
- threat
- 1.Qd6+?
- 1...e5
- 2.Qxe5#
- 1...exd6!
- 1...e5
- 1.Qe6?
- threat
- 2.Qe3#
- 2.Qe5#
- 1...Qxe6
- 2.Sxe6#
- 1...g3
- 2.Rh4#
- 1...b6+!
- threat
- 1.Sh8?
- Keys
- 1.Se5!
- threat
- 2.Sxg6#
- 1...Rc5+
- 2.dxc5#
- 1...Bxh5
- 2.Qh6#
- 1...Qe6
- 2.Sxe6#
- 1...Bf7
- 2.Qh6#
- 1...Bh7
- 2.Qh6#
- 1...Be8
- 2.Qh6#
- 1...g3
- 2.hxg3#
- threat
- 1.Se5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- Q(i);N_GUARD::S(K),XQ(i)
- Q(i);N_GUARD,N_SPINR(g),XB(L)::S(K)
- B(e);OGATE,XS(J)::QAB(I)
- B(e);OGATE::QAB(I)
- P(c);OGATEB::R(H)
- Tries
- Try
- S(J);
- Threat
- S(J),XB(e)
- Vars
- B(e);OGATE,XR(H)::QAB(I)
- Q(i);N_GUARD::S(K),XQ(i)
- B(e);OGATE::QAB(I)
- Refutation
- P(c);
- Try
- B(G);
- Threat
- R(D)+P(E)
- Vars
- Q(i);N_GUARD,N_SPINR(g),XB(L)::S(K)
- B(e);OGATE,XS(J)::QAB(I)
- Q(i);N_GUARD::S(K),XQ(i)
- Refutation
- P(h);N_SPINR(g)
- Try
- B(G);
- Threat
- R(D)+P(E)
- Vars
- Q(i);N_GUARD,N_SPINR(g),XB(L)::S(K)
- B(e);OGATE,XS(J)::QAB(I)
- Q(i);N_GUARD::S(K),XQ(i)
- Refutation
- P(h);N_SPINR(g)
- Try
- B(G);
- Threat
- R(D)+P(E)
- Vars
- P(h);N_SPINR(g),OGATE::R(D)+P(E),XP(h)
- Q(i);N_GUARD::S(K),XQ(i)
- Refutation
- B(e);XS(J)
- Try
- B(G);
- Threat
- R(D)+P(E)
- Vars
- Q(i);XB(G)::S(K),XQ(i)
- B(e);N_GUARD,XS(J)::R1(H),XP(d)
- Refutation
- Q(i);N_SPINR(g),XB(L)
- Try
- B(G);XP(f)
- Threat
- R(D)+P(E)
- Vars
- Q(i);N_GUARD,N_SPINR(g),XB(L)::S(K)
- B(e);OGATE,XS(J)::QAB(I)
- Q(i);N_GUARD::S(K),XQ(i)
- Refutation
- P(h);N_SPINR(g)
- Try
- B(L);CHECK,XR(g)
- Vars
- Q(i);P_PINQ(I),XB(L)::S(K)
- Refutation
- B(j);P_PINQ(I),XB(L)
- Try
- R(H);CHECK,XP(d)
- Refutation
- Q(i);P_PINB(G),XR(H)
- Try
- Q(I);
- Threat
- QAB(I)
- Vars
- Q(i);N_GUARD,N_SPINR(g),XB(L)::S(K)
- P(c);OGATEB::R(H)
- P(h);N_SPINR(g),OGATE::R(D)+P(E),XP(h)
- Q(i);N_GUARD::S(K),XQ(i)
- Refutation
- P(f);CHECK
- Try
- Q(I);CHECK,N_PINR(g)
- Vars
- P(h);P_SPINP(h)::QAB1(I),XP(h)
- Refutation
- P(h);XQ(I)
- Try
- Q(I);
- Threat
- DUALS(2)
- Vars
- Q(i);XQ(I)::S(K),XQ(i)
- P(c);OGATEB::R(H)
- Refutation
- P(f);CHECK
- Try
- Actual
- S(J);N_PINR(g)
- Threat
- S(J),XB(e)
- Vars
- R(g);CHECK,OGATE,P_PINQ(I)::R(D)+P(E),XR(g)
- B(e);OGATE,XR(H)::QAB(I)
- Q(i);N_GUARD::S(K),XQ(i)
- B(e);OGATE::QAB(I)
- P(c);OGATE::P(B),XP(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).