MESON Chess Problem Database
Problem Display
PID: 83773 (2b2n1B/2P4p/1Q2p3/1ppk1PNN/q1p2R2/r4p1K/r2b4/7B w - - 0 1)
Ellerman, Arnoldo
Die Schwalbe, 1960
#2
9 + 13
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Bc3
- 2.Bxf3#
- 1...Be3
- 2.Bxf3#
- 1...Bxf4
- 2.Sxf4#
- 1...Sd7
- 2.Qxe6#
- 1...e5
- 2.Sf6#
- 1...Bc3
- Tries
- 1.Se4?
- threat
- 2.Qxc5#
- 2.Qd6#
- 1...f2+
- 2.Sc3#
- 1...exf5
- 2.Qd6#
- 1...c3
- 2.Qxc5#
- 1...Qb4
- 2.Qd6#
- 1...Qa6
- 2.Qxc5#
- 1...Qa7
- 2.Qd6#
- 1...Be3
- 2.Qd6#
- 1...Bb4
- 2.Qd6#
- 1...Sd7
- 2.Qd6#
- 2.Qxe6#
- 1...Bxf4!
- threat
- 1.Sf7?
- threat
- 2.Sf6#
- 2.Qd6#
- 1...Qa6
- 2.Sf6#
- 1...Bc3
- 2.Bxf3#
- 2.Qd6#
- 1...Sd7
- 2.Qd6#
- 2.Qxe6#
- 1...Bxf4!
- threat
- 1.Bd4?
- threat
- 2.Sf6#
- 2.Qxc5#
- 1...Bxf4
- 2.Qxc5#
- 1...c3
- 2.Qxc5#
- 1...Qb4
- 2.Sf6#
- 1...Qa7
- 2.Sf6#
- 1...Bb4
- 2.Sf6#
- 1...Sd7
- 2.Qxe6#
- 1...cxd4!
- threat
- 1.Be5?
- threat
- 2.Qd6#
- 1...Kxe5
- 2.Qxc5#
- 1...Qa6!
- threat
- 1.Rxf3?
- threat
- 2.Rxa3#
- 2.Rb3#
- 2.Rc3#
- 2.Rd3#
- 2.Re3#
- 1...Rxf3+
- 2.Bxf3#
- 1...Bxg5
- 2.Rd3#
- 1...e5
- 2.Rd3#
- 1...Qd1
- 2.Rd3#
- 1...Qc2
- 2.Rd3#
- 1...Qb3
- 2.Rxb3#
- 2.Rc3#
- 2.Rd3#
- 2.Re3#
- 1...Ra1
- 2.Rd3#
- 1...Rb3
- 2.Rxb3#
- 2.Rc3#
- 2.Rd3#
- 2.Re3#
- 1...Rc3
- 2.Rxc3#
- 2.Rd3#
- 2.Re3#
- 1...Rd3
- 2.Rxd3#
- 2.Re3#
- 1...Re3
- 2.Sf4#
- 2.Rxe3#
- 1...Bc1
- 2.Rd3#
- 1...Be1
- 2.Sf4#
- 2.Rd3#
- 1...Bc3
- 2.Sf4#
- 2.Rf2#
- 2.Rd3#
- 1...Be3
- 2.Rf2#
- 1...Bb4
- 2.Sf4#
- 2.Rd3#
- 1...Bf4
- 2.Sxf4#
- 2.Rd3#
- 1...Ba5
- 2.Sf4#
- 2.Rd3#
- 1...c3!
- threat
- 1.Re4?
- threat
- 2.Sf6#
- 1...f2+
- 2.Re3#
- 1...Bc3
- 2.Sf4#
- 1...Sd7
- 2.Qxe6#
- 1...Bxg5!
- threat
- 1.Se4?
- Keys
- 1.Sxf3!
- threat
- 2.Sf6#
- 1...Rxf3+
- 2.Bxf3#
- 1...Bc3
- 2.Sd2#
- 1...Sd7
- 2.Qxe6#
- threat
- 1.Sxf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 3
- Sets
- B(b);S_CUTR(c)::B(A),XP(d)
- B(b);XR(C)::S(F),XB(b)
- S(m);N_GUARD,S_CUTB(l)::QAB1(G),XP(j)
- P(j);P_PINP(D),SBLOCK::S(F)
- Tries
- Try
- S(E);N_PINP(d)
- Threat
- DUALS(2)
- Vars
- P(d);CHECK::B(A)+S(E),DCHECK
- P(j);XP(D)::QAR1(G)
- P(f);::QAR1(G),XP(h)
- Q(e);::QAR1(G)
- Q(e);::QAR1(G),XP(h)
- B(b);::QAR1(G)
- Refutation
- B(b);XR(C)
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- Q(e);::S(F)
- Refutation
- B(b);XR(C)
- Try
- B(I);
- Threat
- DUALS(2)
- Vars
- B(b);XR(C)::QAR1(G),XP(h)
- P(f);::QAR1(G),XP(h)
- Q(e);::S(F)
- B(b);::S(F)
- S(m);N_GUARD,S_CUTB(l)::QAB1(G),XP(j)
- Refutation
- P(h);XB(I)
- Try
- B(I);
- Threat
- QAR1(G)
- Vars
- K(i);N_SPINP(d),P-FLIGHT,XB(I)::QAR2(G),XP(h)
- Refutation
- Q(e);
- Try
- R(C);P_SPINR(C),XP(d)
- Threat
- DUALS(5)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XR(C)::B(A),XR(c)
- B(b);XS(E)::B(A)+R(C),DCHECK
- P(j);P_PINP(D)::B(A)+R(C),DCHECK
- Q(e);::B(A)+R(C),DCHECK
- R(a);::B(A)+R(C),DCHECK
- B(b);::B(A)+R(C),DCHECK
- B(b);N_PINR(C)::B(A)+R(C)
- Refutation
- P(f);N_PINR(C)
- Try
- R(C);N_PINP(d)
- Threat
- S(F)
- Vars
- P(d);CHECK,OGATEB::B(A)+R(C)
- B(b);N_GUARD::S(F)
- S(m);N_GUARD,S_CUTB(l)::QAB1(G),XP(j)
- Refutation
- B(b);XS(E)
- Try
- Actual
- S(E);P_SPINS(E),XP(d)
- Threat
- S(F)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XS(E)::B(A),XR(c)
- B(b);N_PINS(E)::B(A)+S(E)
- S(m);N_GUARD,S_CUTB(l)::QAB1(G),XP(j)
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).