MESON Chess Problem Database
Problem Display
PID: 67721 (K2Rb1q1/Q1b1B3/n5P1/4k2n/1N1NB1R1/3p2p1/5P2/3r4 w - - 0 1)
Ellerman, Arnoldo
Chess, 1948
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Qd5+
- 2.Rxd5#
- 1...Qe6
- 2.Sf3#
- 1...Qh7
- 2.Rd5#
- 1...Qxg6
- 2.Rd5#
- 1...Qg7
- 2.Rd5#
- 1...Qf8
- 2.Rd5#
- 1...Qh8
- 2.Rd5#
- 1...Ra1
- 2.Sxd3#
- 1...Rb1
- 2.Sxd3#
- 1...Rc1
- 2.Sxd3#
- 1...Re1
- 2.Sxd3#
- 1...Rf1
- 2.Sxd3#
- 1...Rg1
- 2.Sxd3#
- 1...Rh1
- 2.Sxd3#
- 1...Bc6+
- 2.Sbxc6#
- 1...Bxg6
- 2.Sbc6#
- 1...Bf7
- 2.Sbc6#
- 1...Sxb4
- 2.Qxc7#
- 1...Sc5
- 2.Qxc7#
- 1...Sb8
- 2.Qxc7#
- 1...d2
- 2.Sd3#
- 1...Qd5+
- Tries
- 1.Bh1?
- threat
- 2.Re4#
- 1...Qd5+
- 2.Rxd5#
- 1...Bc6+
- 2.Sbxc6#
- 1...Qxg6
- 2.Rd5#
- 1...Rxh1
- 2.Sxd3#
- 1...Bxg6
- 2.Sbc6#
- 1...Re1
- 2.Sxd3#
- 1...Sf4
- 2.Rg5#
- 1...Sf6
- 2.f4#
- 1...Sc5
- 2.Qxc7#
- 1...g2!
- threat
- 1.Bxd3?
- threat
- 2.Re4#
- 1...Qd5+
- 2.Rxd5#
- 1...Bc6+
- 2.Sbxc6#
- 1...Qxg6
- 2.Rd5#
- 1...Rxd3
- 2.Sxd3#
- 1...Bxg6
- 2.Sbc6#
- 1...Sf4
- 2.Rg5#
- 1...Sf6
- 2.f4#
- 1...Sc5
- 2.Qxc7#
- 1...Re1!
- threat
- 1.Bf3?
- threat
- 2.Re4#
- 1...Qd5+
- 2.Rxd5#
- 1...Bc6+
- 2.Sbxc6#
- 1...Qxg6
- 2.Rd5#
- 1...Bxg6
- 2.Sbc6#
- 1...Re1
- 2.Sxd3#
- 1...Sf4
- 2.Rg5#
- 1...Sc5
- 2.Qxc7#
- 1...Sf6!
- threat
- 1.Bd5?
- threat
- 2.Re4#
- 1...Qxd5+
- 2.Rxd5#
- 1...Bc6+
- 2.Sbxc6#
- 1...Bxg6
- 2.Sbc6#
- 1...Re1
- 2.Sxd3#
- 1...Sf4
- 2.Rg5#
- 1...Sf6
- 2.f4#
- 1...Sc5
- 2.Qxc7#
- 1...Qxg6!
- threat
- 1.Bf5?
- threat
- 2.Re4#
- 1...Qd5+
- 2.Rxd5#
- 1...Bc6+
- 2.Sbxc6#
- 1...Re1
- 2.Sxd3#
- 1...Sf6
- 2.f4#
- 1...Sc5
- 2.Qxc7#
- 1...Sf4!
- threat
- 1.Bc6?
- threat
- 2.Re4#
- 1...Bxc6+
- 2.Sbxc6#
- 1...Qxg6
- 2.Rd5#
- 1...Qd5
- 2.Rxd5#
- 1...Re1
- 2.Sxd3#
- 1...Sf4
- 2.Rg5#
- 1...Sf6
- 2.f4#
- 1...Sc5
- 2.Qxc7#
- 1...Bxg6!
- threat
- 1.Bb7?
- threat
- 2.Re4#
- 1...Qxg6
- 2.Rd5#
- 1...Bxg6
- 2.Sbc6#
- 1...Qd5
- 2.Rxd5#
- 1...Re1
- 2.Sxd3#
- 1...Bc6
- 2.Sbxc6#
- 1...Sf4
- 2.Rg5#
- 1...Sf6
- 2.f4#
- 1...Sc5!
- threat
- 1.Qc5+?
- 1...Qd5+
- 2.Rxd5#
- 2.Qxd5#
- 1...Sxc5!
- 1...Qd5+
- 1.Bh1?
- Keys
- 1.Bg2!
- threat
- 2.Re4#
- 1...Qd5+
- 2.Rxd5#
- 1...Bc6+
- 2.Sbxc6#
- 1...Qxg6
- 2.Rd5#
- 1...Bxg6
- 2.Sbc6#
- 1...Re1
- 2.Sxd3#
- 1...Sf4
- 2.Rg5#
- 1...Sf6
- 2.f4#
- 1...Sc5
- 2.Qxc7#
- threat
- 1.Bg2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 15
- Sets
- Q(i);CHECK,N_GUARD::R1(J),XQ(i)
- Q(i);SBLOCK::S(C)
- Q(i);N_GUARD::R1(J)
- Q(i);N_GUARD,XP(F)::R1(J)
- R(a);N_GUARD::S(B),XP(b)
- B(h);CHECK,N_GUARD,P_PINR(J)::S(B),XB(h)
- B(h);N_GUARD,P_PINR(J),XP(F)::S(B)
- B(h);N_GUARD,P_PINR(J)::S(B)
- S(f);N_GUARD,XS(B)::QAB(G),XB(g)
- S(f);N_GUARD::QAB(G),XB(g)
- P(b);S_CUTR(a)::S(B)
- Tries
- Try
- B(D);
- Threat
- R1(E)
- Vars
- Q(i);CHECK,N_GUARD::R1(J),XQ(i)
- B(h);CHECK,N_GUARD,P_PINR(J)::S(B),XB(h)
- Q(i);N_GUARD,XP(F)::R1(J)
- R(a);N_GUARD,XB(D)::S(B),XP(b)
- B(h);N_GUARD,P_PINR(J),XP(F)::S(B)
- R(a);N_GUARD::S(B),XP(b)
- S(e);SBLOCK::R(E)
- S(e);N_GUARD::P(A)
- S(f);N_GUARD::QAB(G),XB(g)
- Refutation
- P(c);
- Try
- B(D);XP(b)
- Threat
- R1(E)
- Vars
- Q(i);CHECK,N_GUARD::R1(J),XQ(i)
- B(h);CHECK,N_GUARD,P_PINR(J)::S(B),XB(h)
- Q(i);N_GUARD,XP(F)::R1(J)
- R(a);XB(D)::S(B),XR(a)
- B(h);N_GUARD,P_PINR(J),XP(F)::S(B)
- S(e);SBLOCK::R(E)
- S(e);N_GUARD::P(A)
- S(f);N_GUARD::QAB(G),XB(g)
- Refutation
- R(a);
- Try
- B(D);
- Threat
- R1(E)
- Vars
- Q(i);CHECK,N_GUARD::R1(J),XQ(i)
- B(h);CHECK,N_GUARD,P_PINR(J)::S(B),XB(h)
- Q(i);N_GUARD,XP(F)::R1(J)
- B(h);N_GUARD,P_PINR(J),XP(F)::S(B)
- R(a);N_GUARD::S(B),XP(b)
- S(e);SBLOCK::R(E)
- S(f);N_GUARD::QAB(G),XB(g)
- Refutation
- S(e);
- Try
- B(D);
- Threat
- R1(E)
- Vars
- Q(i);CHECK,OGATE,XB(D)::R1(J),XQ(i)
- B(h);CHECK,N_GUARD,P_PINR(J)::S(B),XB(h)
- B(h);N_GUARD,P_PINR(J),XP(F)::S(B)
- R(a);N_GUARD::S(B),XP(b)
- S(e);SBLOCK::R(E)
- S(e);N_GUARD::P(A)
- S(f);N_GUARD::QAB(G),XB(g)
- Refutation
- Q(i);XP(F)
- Try
- B(D);
- Threat
- R1(E)
- Vars
- Q(i);CHECK,N_GUARD::R1(J),XQ(i)
- B(h);CHECK,N_GUARD,P_PINR(J)::S(B),XB(h)
- R(a);N_GUARD::S(B),XP(b)
- S(e);N_GUARD::P(A)
- S(f);N_GUARD::QAB(G),XB(g)
- Refutation
- S(e);
- Try
- B(D);
- Threat
- R1(E)
- Vars
- B(h);CHECK,P_PINR(J),XB(D)::S(B),XB(h)
- Q(i);N_GUARD,XP(F)::R1(J)
- Q(i);N_GUARD,P_PINB(D)::R1(J),XQ(i)
- R(a);N_GUARD::S(B),XP(b)
- S(e);SBLOCK::R(E)
- S(e);N_GUARD::P(A)
- S(f);N_GUARD::QAB(G),XB(g)
- Refutation
- B(h);P_PINR(J),XP(F)
- Try
- B(D);
- Threat
- R1(E)
- Vars
- Q(i);N_GUARD,XP(F)::R1(J)
- B(h);N_GUARD,P_PINR(J),XP(F)::S(B)
- Q(i);N_GUARD,P_PINB(D)::R1(J),XQ(i)
- R(a);N_GUARD::S(B),XP(b)
- B(h);N_GUARD,P_PINB(D),P_PINR(J)::S(B),XB(h)
- S(e);SBLOCK::R(E)
- S(e);N_GUARD::P(A)
- Refutation
- S(f);
- Try
- Q(G);CHECK
- Refutation
- S(f);XQ(G)
- Try
- Actual
- B(D);
- Threat
- R1(E)
- Vars
- Q(i);CHECK,N_GUARD::R1(J),XQ(i)
- B(h);CHECK,N_GUARD,P_PINR(J)::S(B),XB(h)
- Q(i);N_GUARD,XP(F)::R1(J)
- B(h);N_GUARD,P_PINR(J),XP(F)::S(B)
- R(a);N_GUARD::S(B),XP(b)
- S(e);SBLOCK::R(E)
- S(e);N_GUARD::P(A)
- S(f);N_GUARD::QAB(G),XB(g)
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).