MESON Chess Problem Database
Problem Display
PID: 231494 (NbR2BB1/1pnpp3/rQ5K/2nP4/P1k1p3/2P4R/P2P1N2/8 w - - 0 1)
van der Ven, AMA
Brisbane Courier, 1927
#2
13 + 9
| 6490 | yacpdb | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Ra5
- 2.Qb4#
- 1...Rxb6+
- 2.Sxb6#
- 1...Ra7
- 2.Qb4#
- 1...Rxa8
- 2.Qb4#
- 1...Sb3
- 2.axb3#
- 1...S5e6
- 2.Qb5#
- 1...Sb5
- 2.Rxc5#
- 1...Sxd5
- 2.Rxc5#
- 1...S7e6
- 2.Qb3#
- 1...Sxa8
- 2.Rxc5#
- 1...Se8
- 2.Rxc5#
- 1...d6
- 2.Qb4#
- 1...e6
- 2.Qxc5#
- 1...Ra5
- Tries
- 1.Kh5?
- threat
- 2.Qb4#
- 1...Rxb6
- 2.Sxb6#
- 1...S5e6
- 2.Qb5#
- 1...S7e6
- 2.Qb3#
- 1...e6
- 2.Qxc5#
- 1...Sd3
- 2.Qd4#
- 2.Qb5#
- 1...Sb5
- 2.Rxc5#
- 2.Qxc5#
- 2.Qxb5#
- 1...Rxa4!
- threat
- 1.Kh7?
- threat
- 2.Qb4#
- 1...Rxb6
- 2.Sxb6#
- 1...S5e6
- 2.Qb5#
- 1...S7e6
- 2.Qb3#
- 1...e6
- 2.Qxc5#
- 1...Sd3
- 2.Qd4#
- 2.Qb5#
- 1...Sb5
- 2.Rxc5#
- 2.Qxc5#
- 2.Qxb5#
- 1...Rxa4!
- threat
- 1.Sd1?
- threat
- 2.Sb2#
- 1...Rxb6+
- 2.Sxb6#
- 1...S5e6
- 2.Qb5#
- 1...S7e6
- 2.Qb3#
- 1...e6
- 2.Qxc5#
- 1...Sd3
- 2.Se3#
- 1...Sxa4!
- threat
- 1.Rxc7?
- threat
- 2.Rxc5#
- 1...Rxb6+
- 2.Sxb6#
- 1...Ra5
- 2.Qb3#
- 2.Qb4#
- 1...d6
- 2.Qb3#
- 2.Qb4#
- 2.Qb5#
- 1...Bxc7!
- threat
- 1.Qxa6+?
- 1...Sb5
- 2.Sb6#
- 2.Qxb5#
- 1...S7xa6
- 2.Sb6#
- 1...bxa6
- 2.Sb6#
- 1...b5
- 2.Sb6#
- 1...S5xa6!
- 1...Sb5
- 1.d6+?
- 1...S5e6
- 2.Qd4#
- 2.Qb5#
- 1...Sd5
- 2.Rxc5#
- 2.Qxc5#
- 2.Qb3#
- 2.Qb4#
- 2.Qb5#
- 1...S7e6
- 2.Rxc5#
- 2.Qxc5#
- 2.Qb3#
- 1...e6!
- 1...S5e6
- 1.Kh5?
- Keys
- 1.Sg4!
- threat
- 2.Se5#
- 1...Rxb6+
- 2.Sxb6#
- 1...Sxd5
- 2.Rxc5#
- 1...Sxa8
- 2.Rxc5#
- 1...S5e6
- 2.Qb5#
- 1...S7e6
- 2.Qb3#
- 1...e6
- 2.Qxc5#
- 1...Sd3
- 2.Se3#
- 1...Sb5
- 2.Rxc5#
- 1...Se8
- 2.Rxc5#
- 1...d6
- 2.Qb4#
- 1...e5
- 2.Sxe5#
- threat
- 1.Sg4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 4
- Sets
- R(d);N_PINQ(H)::QAR1(H)
- R(d);CHECK,XQ(H)::S(J),XR(d)
- R(d);N_PINQ(H),XS(J)::QAR1(H)
- S(c);OGATE,P_SPINS(f)::P(A),XS(c)
- S(c);N_PINQ(H),P_SPINS(f)::QAB1(H)
- S(f);OGATE,P_SPINS(c)::R1(K),XS(c)
- S(f);OGATE,P_SPINS(c),XP(G)::R1(K),XS(c)
- S(f);N_PINQ(H),P_SPINS(c)::QAB1(H)
- S(f);OGATE,P_SPINS(c),XS(J)::R1(K),XS(c)
- P(g);N_PINQ(H)::QAR1(H)
- P(h);N_PINQ(H)::QAR1(H),XS(c)
- Tries
- Try
- K(I);N_SPINQ(H),P-FLIGHT
- Threat
- QAR1(H)
- Vars
- R(d);XQ(H)::S(J),XR(d)
- S(c);P_SPINS(f)::QAB1(H)
- S(f);P_SPINS(c)::QAB1(H)
- P(h);::QAR1(H),XS(c)
- Refutation
- R(d);XP(F)
- Try
- K(I);N_SPINQ(H),P-FLIGHT
- Threat
- QAR1(H)
- Vars
- R(d);XQ(H)::S(J),XR(d)
- S(c);P_SPINS(f)::QAB1(H)
- S(f);P_SPINS(c)::QAB1(H)
- P(h);::QAR1(H),XS(c)
- Refutation
- R(d);XP(F)
- Try
- S(C);
- Threat
- S(C)
- Vars
- R(d);CHECK,XQ(H)::S(J),XR(d)
- S(c);N_PINQ(H),P_SPINS(f)::QAB1(H)
- S(f);N_PINQ(H),P_SPINS(c)::QAB1(H)
- P(h);N_PINQ(H)::QAR1(H),XS(c)
- S(c);P_SPINS(f),SBLOCK::S(C)
- Refutation
- S(c);P_SPINS(f),XP(F)
- Try
- R(K);P_PINS(c),XS(f)
- Threat
- R1(K),XS(c)
- Vars
- R(d);CHECK,XQ(H)::S(J),XR(d)
- Refutation
- B(i);N_SPINS(c),XR(K)
- Try
- Q(H);CHECK,N_SPINQ(H),XR(d)
- Vars
- S(f);P_SPINS(c),XQ(H)::S(J)
- P(e);XQ(H)::S(J)
- P(e);P_SPINP(e)::S(J)
- Refutation
- S(c);P_SPINS(f),XQ(H)
- Try
- P(G);CHECK,N_SPINQ(H)
- Refutation
- P(h);P_SPINP(h)
- Try
- Actual
- S(C);
- Threat
- S(C)
- Vars
- R(d);CHECK,XQ(H)::S(J),XR(d)
- S(f);OGATE,P_SPINS(c),XP(G)::R1(K),XS(c)
- S(f);OGATE,P_SPINS(c),XS(J)::R1(K),XS(c)
- S(c);N_PINQ(H),P_SPINS(f)::QAB1(H)
- S(f);N_PINQ(H),P_SPINS(c)::QAB1(H)
- P(h);N_PINQ(H)::QAR1(H),XS(c)
- S(c);P_SPINS(f),SBLOCK::S(C)
- S(f);OGATE,P_SPINS(c)::R1(K),XS(c)
- P(g);N_PINQ(H)::QAR1(H)
- P(h);::S(C),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).