MESON Chess Problem Database
Problem Display
PID: 245075 (1qb5/8/2PRpp2/Q4P1R/2N1k2P/4Pp1B/1r1P3K/b1N3B1 w - - 0 1)
Ellerman, Arnoldo
Schackvarlden, 1932
#2
13 + 8
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qxd6+
- 2.Sxd6#
- 1...Qb3
- 2.Rd4#
- 1...Qb4
- 2.Rd4#
- 1...Qb5
- 2.Rd4#
- 1...Qb7
- 2.Rd4#
- 1...Qa8
- 2.Rd4#
- 1...Rb1
- 2.d3#
- 1...Rxd2+
- 2.Sxd2#
- 1...Rb4
- 2.d3#
- 1...Rb5
- 2.d3#
- 1...Rb6
- 2.d3#
- 1...Rb7
- 2.d3#
- 1...f2
- 2.Bg2#
- 1...exf5
- 2.Qd5#
- 1...e5
- 2.Qd5#
- 1...Qxd6+
- Tries
- 1.Kh1?
- threat
- 2.Rd4#
- 2.d3#
- 1...Qxd6
- 2.Sxd6#
- 1...Rxd2
- 2.Sxd2#
- 1...f2
- 2.Bg2#
- 1...Qa7
- 2.d3#
- 1...Qb3
- 2.Rd4#
- 1...Qb6
- 2.d3#
- 1...Rb1
- 2.d3#
- 1...Ra2
- 2.d3#
- 1...Rc2
- 2.d3#
- 1...Rb4
- 2.d3#
- 1...Rb5
- 2.d3#
- 1...Rb6
- 2.d3#
- 1...Rb7
- 2.d3#
- 1...e5
- 2.Qd5#
- 2.d3#
- 1...Rb3!
- threat
- 1.Kg3?
- threat
- 2.d3#
- 1...Qxd6+
- 2.Sxd6#
- 1...Rxd2
- 2.Sxd2#
- 1...Qb3
- 2.Rd4#
- 1...Rb3!
- threat
- 1.Se2?
- threat
- 2.Sc3#
- 2.Sg3#
- 2.d3#
- 1...Rxd2
- 2.Sxd2#
- 1...fxe2
- 2.Bg2#
- 1...f2
- 2.Bg2#
- 1...Rb3
- 2.Sg3#
- 1...Qb3
- 2.Sg3#
- 2.Rd4#
- 1...Qb4
- 2.Sg3#
- 2.Rd4#
- 2.d3#
- 1...Rb1
- 2.Sg3#
- 2.d3#
- 1...Ra2
- 2.Sg3#
- 2.d3#
- 1...Rc2
- 2.Sg3#
- 2.d3#
- 1...Rb4
- 2.Sg3#
- 2.d3#
- 1...Rb5
- 2.Sg3#
- 2.d3#
- 1...Rb6
- 2.Sg3#
- 2.d3#
- 1...Rb7
- 2.Sg3#
- 2.d3#
- 1...Qxd6+!
- threat
- 1.Sd3?
- threat
- 2.Sf2#
- 2.Sc5#
- 1...Rxd2+
- 2.Sxd2#
- 1...f2
- 2.Bg2#
- 1...Qa7
- 2.Sf2#
- 1...Qb4
- 2.Sf2#
- 2.Rd4#
- 1...Qb5
- 2.Sf2#
- 2.Rd4#
- 1...Qb6
- 2.Sf2#
- 1...Rb5
- 2.Sf2#
- 1...Qxd6+!
- threat
- 1.Bf2?
- threat
- 2.d3#
- 1...Qxd6+
- 2.Sxd6#
- 1...Rxd2
- 2.Sxd2#
- 1...Qb3
- 2.Rd4#
- 1...Rb3!
- threat
- 1.Bf1?
- threat
- 2.Bd3#
- 1...Qxd6+
- 2.Sxd6#
- 1...Rxd2+
- 2.Sxd2#
- 1...f2
- 2.Bg2#
- 1...Qb3
- 2.Rd4#
- 1...Rb3!
- threat
- 1.Qc3?
- threat
- 2.Qd4#
- 2.Qd3#
- 1...Rxd2+
- 2.Sxd2#
- 1...f2
- 2.Bg2#
- 1...Rb3
- 2.d3#
- 1...Qa7
- 2.Qd3#
- 1...Qb3
- 2.Rd4#
- 2.Qd4#
- 1...Qb6
- 2.Qd3#
- 1...Rb1
- 2.Qc2#
- 2.Qd3#
- 2.d3#
- 1...Ra2
- 2.Qd3#
- 1...Rc2
- 2.Qxc2#
- 2.Qd3#
- 1...Rb4
- 2.Qc2#
- 2.Qd3#
- 2.d3#
- 1...Rb5
- 2.Qc2#
- 2.Qd3#
- 2.d3#
- 1...Rb6
- 2.Qc2#
- 2.Qd3#
- 2.d3#
- 1...Rb7
- 2.Qc2#
- 2.Qd3#
- 2.d3#
- 1...e5
- 2.Qd3#
- 1...Qxd6+!
- threat
- 1.fxe6?
- threat
- 2.Bf5#
- 2.Qd5#
- 2.Qf5#
- 1...Qxd6+
- 2.Sxd6#
- 1...Rxd2+
- 2.Sxd2#
- 1...f2
- 2.Bg2#
- 2.Qd5#
- 2.Qf5#
- 1...Qb5
- 2.Rd4#
- 1...Rb5
- 2.d3#
- 1...f5
- 2.Bxf5#
- 2.Qd5#
- 2.Qe5#
- 2.Qxf5#
- 1...Bxe6!
- threat
- 1.Kh1?
- Keys
- 1.Rg5!
- threat
- 2.Rg4#
- 1...Qxd6+
- 2.Sxd6#
- 1...Rxd2+
- 2.Sxd2#
- 1...exf5
- 2.Qd5#
- 1...fxg5
- 2.Qe5#
- 1...f2
- 2.Bg2#
- 1...Qb5
- 2.Rd4#
- 1...Rb5
- 2.d3#
- 1...e5
- 2.Qd5#
- threat
- 1.Rg5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 8
- Sets
- Q(g);CHECK,XR(M)::S(G),XQ(g)
- Q(g);N_PINR(M)::R1(M)
- R(b);N_PINP(C)::P(C)
- R(b);CHECK,XP(C)::S(G),XR(b)
- P(c);N_PINP(C),OGATEB::B(F)
- P(e);N_GUARD,XP(J)::QAB1(I)
- P(e);N_GUARD,N_PINR(M)::QAB1(I)
- Tries
- Try
- K(D);N_SPINP(C),N_SPINR(M),P-FLIGHT
- Threat
- DUALS(2)
- Vars
- Q(g);XR(M)::S(G),XQ(g)
- R(b);XP(C)::S(G),XR(b)
- P(c);OGATEB::B(F)
- Q(g);::P(C)
- Q(g);::R1(M)
- R(b);::P(C)
- Refutation
- R(b);
- Try
- K(D);N_SPINP(C),S_FLIGHT
- Threat
- P(C)
- Vars
- Q(g);CHECK,XR(M)::S(G),XQ(g)
- R(b);XP(C)::S(G),XR(b)
- Q(g);N_PINR(M)::R1(M)
- Refutation
- R(b);
- Try
- S(A);N_SPINP(C)
- Threat
- DUALS(3)
- Vars
- R(b);P_PINS(A),XP(C)::S(G),XR(b)
- P(c);OGATEB,XS(A)::B(F)
- P(c);OGATEB::B(F)
- R(b);::S(A)
- Refutation
- Q(g);CHECK,XR(M)
- Try
- S(A);
- Threat
- DUALS(2)
- Vars
- R(b);CHECK,XP(C)::S(G),XR(b)
- P(c);N_PINP(C),OGATEB::B(F)
- Q(g);N_PINR(M)::S(A)
- R(b);N_PINP(C)::S(A)
- Refutation
- Q(g);CHECK,XR(M)
- Try
- B(B);N_SPINP(C)
- Threat
- P(C)
- Vars
- Q(g);CHECK,XR(M)::S(G),XQ(g)
- R(b);P_PINB(B),XP(C)::S(G),XR(b)
- Q(g);N_PINR(M)::R1(M)
- Refutation
- R(b);
- Try
- B(F);
- Threat
- B(F)
- Vars
- Q(g);CHECK,XR(M)::S(G),XQ(g)
- R(b);CHECK,XP(C)::S(G),XR(b)
- P(c);N_PINP(C),OGATEB::B(F)
- Q(g);N_PINR(M)::R1(M)
- Refutation
- R(b);N_PINP(C)
- Try
- Q(I);
- Threat
- DUALS(2)
- Vars
- R(b);CHECK,XP(C)::S(G),XR(b)
- P(c);N_PINP(C),OGATEB::B(F)
- R(b);N_PINP(C)::P(C)
- Q(g);N_PINR(M)::QAB1(I)
- R(b);::QAB1(I)
- P(e);N_PINR(M)::QAB1(I)
- Refutation
- Q(g);CHECK,XR(M)
- Try
- P(J);XP(e)
- Threat
- DUALS(3)
- Vars
- Q(g);CHECK,XR(M)::S(G),XQ(g)
- R(b);CHECK,XP(C)::S(G),XR(b)
- Q(g);N_PINR(M)::R1(M)
- R(b);N_PINP(C)::P(C)
- Refutation
- B(h);XP(J)
- Try
- Actual
- R(K);
- Threat
- R(K)
- Vars
- Q(g);CHECK,XR(M)::S(G),XQ(g)
- R(b);CHECK,XP(C)::S(G),XR(b)
- P(e);N_GUARD,XP(J)::QAB1(I)
- P(f);N_GUARD,XR(K)::QAR1(I)
- P(c);N_PINP(C),OGATEB::B(F)
- Q(g);N_PINR(M)::R1(M)
- R(b);N_PINP(C)::P(C)
- P(e);N_GUARD,N_PINR(M)::QAB1(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).