MESON Chess Problem Database
Problem Display
PID: 83723 (4qN2/b1p3p1/2pk1Pp1/P1R2b2/4Q2r/1B5p/3N4/1K1R4 w - - 0 1)
Ellerman, Arnoldo
Brisbane Courier, 1933
#2
9 + 10
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qf7
- 2.Rxc6#
- 1...Qxe4+
- 2.Sxe4#
- 1...Qe5
- 2.Rxc6#
- 1...Qe6
- 2.Rxc6#
- 1...Qe7
- 2.Rxc6#
- 1...Qb8
- 2.Rxc6#
- 1...Qc8
- 2.Rxc6#
- 1...Qd8
- 2.Rxc6#
- 1...Rxe4
- 2.Sxe4#
- 1...Bxe4+
- 2.Sxe4#
- 1...Bg4
- 2.Qd4#
- 1...Be6
- 2.Qe5#
- 1...Bxc5
- 2.Sc4#
- 1...Qf7
- Tries
- 1.Ba2?
- threat
- 2.Sb3#
- 1...Qxe4+
- 2.Sxe4#
- 1...Bxe4+
- 2.Sxe4#
- 1...Rxe4
- 2.Sxe4#
- 1...Bxc5
- 2.Sc4#
- 1...Qf7
- 2.Rxc6#
- 1...Qe5
- 2.Rxc6#
- 1...Qe6
- 2.Rxc6#
- 1...Bg4
- 2.Qd4#
- 1...Be6
- 2.Qe5#
- 1...Kxc5!
- threat
- 1.Bc2?
- threat
- 2.Sb3#
- 1...Qxe4
- 2.Sxe4#
- 1...Rxe4
- 2.Sxe4#
- 1...Bxe4
- 2.Sxe4#
- 1...Bxc5
- 2.Sc4#
- 1...Qf7
- 2.Rxc6#
- 2.Qxc6#
- 2.Qe5#
- 1...Qe5
- 2.Rxc6#
- 2.Qxc6#
- 2.Qxe5#
- 1...Qe6
- 2.Rxc6#
- 2.Qxc6#
- 1...Bg4
- 2.Qd4#
- 1...Be6
- 2.Qe5#
- 1...Kxc5!
- threat
- 1.Bf7?
- threat
- 2.Sb3#
- 1...Qxe4+
- 2.Sxe4#
- 1...Bxe4+
- 2.Sxe4#
- 1...Qxf7
- 2.Rxc6#
- 1...Rxe4
- 2.Sxe4#
- 1...Bxc5
- 2.Sc4#
- 1...Qe5
- 2.Rxc6#
- 1...Qe6
- 2.Rxc6#
- 1...Bg4
- 2.Qd4#
- 1...Be6
- 2.Qe5#
- 1...Kxc5!
- threat
- 1.Bg8?
- threat
- 2.Sb3#
- 1...Qxe4+
- 2.Sxe4#
- 1...Bxe4+
- 2.Sxe4#
- 1...Rxe4
- 2.Sxe4#
- 1...Bxc5
- 2.Sc4#
- 1...Qf7
- 2.Rxc6#
- 1...Qe5
- 2.Rxc6#
- 1...Qe6
- 2.Rxc6#
- 1...Bg4
- 2.Qd4#
- 1...Be6
- 2.Qe5#
- 1...Kxc5!
- threat
- 1.Rb5?
- threat
- 2.Sc4#
- 1...Qxe4+
- 2.Sxe4#
- 1...Bxe4+
- 2.Sxe4#
- 1...cxb5!
- threat
- 1.Rxf5?
- threat
- 2.Sc4#
- 1...Qxe4+
- 2.Sxe4#
- 1...Qe5
- 2.Qxe5#
- 1...gxf5!
- threat
- 1.Qxf5?
- threat
- 2.Sc4#
- 2.Se4#
- 1...Qe4+
- 2.Sxe4#
- 1...gxf5
- 2.Se4#
- 1...Qe5
- 2.Se4#
- 2.Qxe5#
- 1...Rc4
- 2.Sxc4#
- 2.Se4#
- 1...Rd4
- 2.Sc4#
- 1...Re4
- 2.Sc4#
- 2.Sxe4#
- 1...gxf6!
- threat
- 1.Ba2?
- Keys
- 1.Ba4!
- threat
- 2.Sb3#
- 1...Qxe4+
- 2.Sxe4#
- 1...Bxe4+
- 2.Sxe4#
- 1...Kxc5
- 2.Sb3#
- 1...Rxe4
- 2.Sxe4#
- 1...Bxc5
- 2.Sc4#
- 1...Qf7
- 2.Rxc6#
- 1...Qe5
- 2.Rxc6#
- 1...Qe6
- 2.Rxc6#
- 1...Bg4
- 2.Qd4#
- 1...Be6
- 2.Qe5#
- threat
- 1.Ba4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 4
- Sets
- Q(j);N_GUARD::R1(G),XP(d)
- Q(j);CHECK,XQ(E)::R(B)+S(C),DCHECK,XQ(j)
- Q(j);N_GUARD,P_PINB(D)::R1(G),XP(d)
- R(b);XQ(E)::R(B)+S(C),DCHECK,XR(b)
- B(c);CHECK,XQ(E)::R(B)+S(C),DCHECK,XB(c)
- B(c);N_PINQ(E)::QAR2(E)
- B(c);N_PINQ(E)::QAB1(E)
- B(g);SBLOCK,XR(G)::R(B)+S(C),DCHECK
- Tries
- Try
- B(D);
- Threat
- R(B)+S(C)
- Vars
- Q(j);CHECK,XQ(E)::R(B)+S(C),DCHECK,XQ(j)
- B(c);CHECK,XQ(E)::R(B)+S(C),DCHECK,XB(c)
- R(b);XQ(E)::R(B)+S(C),DCHECK,XR(b)
- B(g);SBLOCK,XR(G)::R(B)+S(C),DCHECK
- Q(j);N_GUARD::R1(G),XP(d)
- B(c);N_PINQ(E)::QAR2(E)
- B(c);N_PINQ(E)::QAB1(E)
- Refutation
- K(e);S_FLIGHT,XR(G)
- Try
- B(D);N_SPINQ(E)
- Threat
- R(B)+S(C)
- Vars
- Q(j);P_PINB(D),XQ(E)::R(B)+S(C),DCHECK,XQ(j)
- R(b);XQ(E)::R(B)+S(C),DCHECK,XR(b)
- B(c);P_PINB(D),XQ(E)::R(B)+S(C),DCHECK,XB(c)
- B(g);SBLOCK,XR(G)::R(B)+S(C),DCHECK
- B(c);S_CUTR(b)::QAR2(E)
- B(c);S_CUTQ(j)::QAB1(E)
- Refutation
- K(e);S_FLIGHT,XR(G)
- Try
- B(D);
- Threat
- R(B)+S(C)
- Vars
- Q(j);CHECK,XQ(E)::R(B)+S(C),DCHECK,XQ(j)
- B(c);CHECK,XQ(E)::R(B)+S(C),DCHECK,XB(c)
- Q(j);N_GUARD,XB(D)::R1(G),XP(d)
- R(b);XQ(E)::R(B)+S(C),DCHECK,XR(b)
- B(g);SBLOCK,XR(G)::R(B)+S(C),DCHECK
- Q(j);N_GUARD::R1(G),XP(d)
- B(c);N_PINQ(E)::QAR2(E)
- B(c);N_PINQ(E)::QAB1(E)
- Refutation
- K(e);S_FLIGHT,XR(G)
- Try
- B(D);
- Threat
- R(B)+S(C)
- Vars
- Q(j);CHECK,XQ(E)::R(B)+S(C),DCHECK,XQ(j)
- B(c);CHECK,XQ(E)::R(B)+S(C),DCHECK,XB(c)
- R(b);XQ(E)::R(B)+S(C),DCHECK,XR(b)
- B(g);SBLOCK,XR(G)::R(B)+S(C),DCHECK
- Q(j);N_GUARD::R1(G),XP(d)
- B(c);N_PINQ(E)::QAR2(E)
- B(c);N_PINQ(E)::QAB1(E)
- Refutation
- K(e);S_FLIGHT,XR(G)
- Try
- R(G);
- Threat
- R(B)+S(C),DCHECK
- Vars
- Q(j);CHECK,XQ(E)::R(B)+S(C),DCHECK,XQ(j)
- B(c);CHECK,XQ(E)::R(B)+S(C),DCHECK,XB(c)
- Refutation
- P(d);XR(G)
- Try
- R(G);N_SPINQ(E),XB(c)
- Threat
- R(B)+S(C),DCHECK
- Vars
- Q(j);CHECK,XQ(E)::R(B)+S(C),DCHECK,XQ(j)
- Q(j);N_GUARD::QAB1(E),XQ(j)
- Refutation
- P(f);XR(G)
- Try
- Q(E);N_SPINQ(E),XB(c)
- Threat
- DUALS(2)
- Vars
- Q(j);CHECK::R(B)+S(C),DCHECK,XQ(j)
- P(f);XQ(E)::R(B)+S(C),DCHECK
- R(b);::S(C)
- Refutation
- P(i);XP(H)
- Try
- Actual
- B(D);
- Threat
- R(B)+S(C)
- Vars
- Q(j);CHECK,XQ(E)::R(B)+S(C),DCHECK,XQ(j)
- B(c);CHECK,XQ(E)::R(B)+S(C),DCHECK,XB(c)
- K(e);S_FLIGHT,XR(G)::S(C)
- R(b);XQ(E)::R(B)+S(C),DCHECK,XR(b)
- B(g);SBLOCK,XR(G)::R(B)+S(C),DCHECK
- Q(j);N_GUARD::R1(G),XP(d)
- B(c);N_PINQ(E)::QAR2(E)
- B(c);N_PINQ(E)::QAB1(E)
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).