MESON Chess Problem Database
Problem Display
PID: 61353 (2b1N3/3p4/p4N2/Ppk1rQp1/1R1R2K1/6B1/2p4p/2r4B w - - 0 1)
Grasemann, Herbert
Chess, 1948
#2
9 + 10
| 45 | Schach | 1951 |
| 56 | The Problemist | 2013 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Qxc2#
- 1...Rb1
- 2.Qxc2#
- 1...Rd1
- 2.Qxc2#
- 1...Re1
- 2.Qxc2#
- 1...Rf1
- 2.Qxc2#
- 1...Rg1
- 2.Qxc2#
- 1...Rxh1
- 2.Qxc2#
- 1...Rd5
- 2.Qxd5#
- 1...Rxf5
- 2.Bd6#
- 1...Bb7
- 2.Sxd7#
- 1...d5
- 2.Qxc8#
- 1...d6
- 2.Qxc8#
- 1...Ra1
- Tries
- 1.Kh3?
- 1...Rxh1
- 2.Qxc2#
- 1...Rxf5
- 2.Bd6#
- 1...Rd5
- 2.Qxd5#
- 1...d5
- 2.Qxc8#
- 1...Ra1
- 2.Qxc2#
- 1...Rb1
- 2.Qxc2#
- 1...Rd1
- 2.Qxc2#
- 1...Re1
- 2.Qxc2#
- 1...Rf1
- 2.Qxc2#
- 1...Rg1
- 2.Qxc2#
- 1...Bb7
- 2.Sxd7#
- 1...d6
- 2.Qxc8#
- 1...g4+!
- 1...Rxh1
- 1.Kh5?
- 1...Rxh1
- 2.Qxc2#
- 1...Rxf5
- 2.Bd6#
- 1...Rd5
- 2.Qxd5#
- 1...d5
- 2.Qxc8#
- 1...Ra1
- 2.Qxc2#
- 1...Rb1
- 2.Qxc2#
- 1...Rd1
- 2.Qxc2#
- 1...Re1
- 2.Qxc2#
- 1...Rf1
- 2.Qxc2#
- 1...Rg1
- 2.Qxc2#
- 1...Bb7
- 2.Sxd7#
- 1...d6
- 2.Qxc8#
- 1...g4!
- 1...Rxh1
- 1.Sh5?
- 1...Rxh1
- 2.Qxc2#
- 1...Rxf5
- 2.Bd6#
- 1...Rd5
- 2.Qxd5#
- 1...d5
- 2.Qxc8#
- 1...Ra1
- 2.Qxc2#
- 1...Rb1
- 2.Qxc2#
- 1...Rd1
- 2.Qxc2#
- 1...Re1
- 2.Qxc2#
- 1...Rf1
- 2.Qxc2#
- 1...Rg1
- 2.Qxc2#
- 1...d6
- 2.Qxc8#
- 1...Bb7!
- 1...Rxh1
- 1.Sh7?
- 1...Rxh1
- 2.Qxc2#
- 1...Rxf5
- 2.Bd6#
- 1...Rd5
- 2.Qxd5#
- 1...d5
- 2.Qxc8#
- 1...Ra1
- 2.Qxc2#
- 1...Rb1
- 2.Qxc2#
- 1...Rd1
- 2.Qxc2#
- 1...Re1
- 2.Qxc2#
- 1...Rf1
- 2.Qxc2#
- 1...Rg1
- 2.Qxc2#
- 1...d6
- 2.Qxc8#
- 1...Bb7!
- 1...Rxh1
- 1.Sg8?
- 1...Rxh1
- 2.Qxc2#
- 1...Rxf5
- 2.Bd6#
- 1...Rd5
- 2.Qxd5#
- 1...d5
- 2.Qxc8#
- 1...Ra1
- 2.Qxc2#
- 1...Rb1
- 2.Qxc2#
- 1...Rd1
- 2.Qxc2#
- 1...Re1
- 2.Qxc2#
- 1...Rf1
- 2.Qxc2#
- 1...Rg1
- 2.Qxc2#
- 1...d6
- 2.Qxc8#
- 1...Bb7!
- 1...Rxh1
- 1.Sd6?
- threat
- 2.Qxe5#
- 1...Rxh1
- 2.Qxc2#
- 1...Rd5
- 2.Qxd5#
- 1...Bb7
- 2.Sxb7#
- 2.Sxd7#
- 1...Re1
- 2.Qxc2#
- 1...Rxf5!
- threat
- 1.Sg7?
- 1...Rxh1
- 2.Qxc2#
- 1...Rxf5
- 2.Bd6#
- 1...Rd5
- 2.Qxd5#
- 1...Bb7
- 2.Sxd7#
- 1...Ra1
- 2.Qxc2#
- 1...Rb1
- 2.Qxc2#
- 1...Rd1
- 2.Qxc2#
- 1...Re1
- 2.Qxc2#
- 1...Rf1
- 2.Qxc2#
- 1...Rg1
- 2.Qxc2#
- 1...d6
- 2.Qxc8#
- 1...d5!
- 1...Rxh1
- 1.Be1?
- 1...Rxe1
- 2.Qxc2#
- 1...Rd5
- 2.Qxd5#
- 1...d5
- 2.Qxc8#
- 1...Ra1
- 2.Qxc2#
- 1...Rb1
- 2.Qxc2#
- 1...Rd1
- 2.Qxc2#
- 1...Bb7
- 2.Sxd7#
- 1...d6
- 2.Qxc8#
- 1...Rxf5!
- 1...Rxe1
- 1.Bf2?
- threat
- 2.Rdc4#
- 2.Rf4#
- 1...Rxh1
- 2.Rdc4#
- 2.Qxc2#
- 1...Rd5
- 2.Rdc4#
- 2.Qxd5#
- 1...d5
- 2.Rdc4#
- 2.Qxc8#
- 1...Rd1
- 2.Rdc4#
- 2.Qxc2#
- 1...Re1
- 2.Rdc4#
- 2.Qxc2#
- 1...Rf1
- 2.Rdc4#
- 2.Qxc2#
- 1...Rg1+!
- threat
- 1.Bxh2?
- 1...Rxh1
- 2.Qxc2#
- 1...Rxf5
- 2.Bd6#
- 1...Rd5
- 2.Qxd5#
- 1...d5
- 2.Qxc8#
- 1...Ra1
- 2.Qxc2#
- 1...Rb1
- 2.Qxc2#
- 1...Rd1
- 2.Qxc2#
- 1...Re1
- 2.Qxc2#
- 1...Rf1
- 2.Qxc2#
- 1...Bb7
- 2.Sxd7#
- 1...d6
- 2.Qxc8#
- 1...Rg1+!
- 1...Rxh1
- 1.Bxe5?
- threat
- 2.Bd6#
- 1...Rxh1
- 2.Qxc2#
- 1...d5
- 2.Qxc8#
- 1...d6
- 2.Bxd6#
- 2.Qxc8#
- 1...Rg1+!
- threat
- 1.Rf4?
- threat
- 2.Bf2#
- 1...Rxh1
- 2.Qxc2#
- 1...Rd5
- 2.Qxd5#
- 1...d5
- 2.Qxc8#
- 1...Rd1
- 2.Qxc2#
- 1...Re1
- 2.Qxc2#
- 1...Rf1
- 2.Qxc2#
- 1...Rg1
- 2.Qxc2#
- 1...gxf4!
- threat
- 1.Kh3?
- Keys
- 1.Qxd7!
- threat
- 2.Qxc8#
- 1...Re4+
- 2.Sxe4#
- 1...Bxd7+
- 2.Sxd7#
- 1...Rxe8
- 2.Bd6#
- 1...Re6
- 2.Qd5#
- 1...Re7
- 2.Bd6#
- 1...Bb7
- 2.Qd6#
- threat
- 1.Qxd7!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 11
- Sets
- R(a);N_GUARD::QAR(G),XP(b)
- R(a);N_GUARD,P_PINB(B)::QAR(G),XP(b)
- R(a);N_GUARD,XB(A)::QAR(G),XP(b)
- R(f);OGATE::QAR1(G),XR(f)
- R(f);N_SPINR(f),OGATE,XQ(G)::B(B)
- B(j);N_GUARD::S(H),XP(i)
- P(i);N_SPINR(f),OGATE,P_PINQ(G)::QAR(G),XB(j)
- P(i);OGATE,P_PINQ(G)::QAR(G),XB(j)
- Tries
- Try
- K(E);S_FLIGHT
- Vars
- R(a);N_GUARD,XB(A)::QAR(G),XP(b)
- R(f);N_SPINR(f),OGATE,XQ(G)::B(B)
- R(f);OGATE::QAR1(G),XR(f)
- P(i);N_SPINR(f),OGATE,P_PINQ(G)::QAR(G),XB(j)
- R(a);N_GUARD::QAR(G),XP(b)
- B(j);N_GUARD::S(H),XP(i)
- P(i);OGATE,P_PINQ(G)::QAR(G),XB(j)
- Refutation
- P(g);CHECK
- Try
- K(E);S_FLIGHT
- Vars
- R(a);N_GUARD,XB(A)::QAR(G),XP(b)
- R(f);N_SPINR(f),OGATE,XQ(G)::B(B)
- R(f);OGATE::QAR1(G),XR(f)
- P(i);N_SPINR(f),OGATE::QAR(G),XB(j)
- R(a);N_GUARD::QAR(G),XP(b)
- B(j);N_GUARD::S(H),XP(i)
- P(i);OGATE::QAR(G),XB(j)
- Refutation
- P(g);P_PINQ(G)
- Try
- S(H);
- Vars
- R(a);N_GUARD,XB(A)::QAR(G),XP(b)
- R(f);N_SPINR(f),OGATE,XQ(G)::B(B)
- R(f);OGATE::QAR1(G),XR(f)
- P(i);N_SPINR(f),OGATE,P_PINQ(G)::QAR(G),XB(j)
- R(a);N_GUARD::QAR(G),XP(b)
- R(a);N_GUARD,P_PINB(B)::QAR(G),XP(b)
- P(i);OGATE,P_PINQ(G)::QAR(G),XB(j)
- Refutation
- B(j);
- Try
- S(H);
- Vars
- R(a);N_GUARD,XB(A)::QAR(G),XP(b)
- R(f);N_SPINR(f),OGATE,XQ(G)::B(B)
- R(f);OGATE::QAR1(G),XR(f)
- P(i);N_SPINR(f),OGATE,P_PINQ(G)::QAR(G),XB(j)
- R(a);N_GUARD::QAR(G),XP(b)
- R(a);N_GUARD,P_PINB(B)::QAR(G),XP(b)
- P(i);OGATE,P_PINQ(G)::QAR(G),XB(j)
- Refutation
- B(j);
- Try
- S(H);
- Vars
- R(a);N_GUARD,XB(A)::QAR(G),XP(b)
- R(f);N_SPINR(f),OGATE,XQ(G)::B(B)
- R(f);OGATE::QAR1(G),XR(f)
- P(i);N_SPINR(f),OGATE,P_PINQ(G)::QAR(G),XB(j)
- R(a);N_GUARD::QAR(G),XP(b)
- R(a);N_GUARD,P_PINB(B)::QAR(G),XP(b)
- P(i);OGATE,P_PINQ(G)::QAR(G),XB(j)
- Refutation
- B(j);
- Try
- S(I);
- Threat
- QAR2(G),XR(f)
- Vars
- R(a);N_GUARD,XB(A)::QAR(G),XP(b)
- R(f);OGATE::QAR1(G),XR(f)
- R(a);N_GUARD::QAR(G),XP(b)
- Refutation
- R(f);N_SPINR(f),XQ(G)
- Try
- S(I);
- Vars
- R(a);N_GUARD,XB(A)::QAR(G),XP(b)
- R(f);N_SPINR(f),OGATE,XQ(G)::B(B)
- R(f);OGATE::QAR1(G),XR(f)
- B(j);N_GUARD::S(H),XP(i)
- R(a);N_GUARD::QAR(G),XP(b)
- R(a);N_GUARD,P_PINB(B)::QAR(G),XP(b)
- P(i);OGATE,P_PINQ(G)::QAR(G),XB(j)
- Refutation
- P(i);N_SPINR(f),P_PINQ(G)
- Try
- B(B);
- Vars
- R(a);N_GUARD,XB(B)::QAR(G),XP(b)
- R(f);OGATE::QAR1(G),XR(f)
- P(i);N_SPINR(f),OGATE,P_PINQ(G)::QAR(G),XB(j)
- R(a);N_GUARD::QAR(G),XP(b)
- B(j);N_GUARD::S(H),XP(i)
- P(i);OGATE,P_PINQ(G)::QAR(G),XB(j)
- Refutation
- R(f);N_SPINR(f),XQ(G)
- Try
- B(B);
- Threat
- DUALS(2)
- Refutation
- R(a);CHECK
- Try
- B(B);XP(c)
- Vars
- R(a);N_GUARD,XB(A)::QAR(G),XP(b)
- R(f);N_SPINR(f),OGATE,XQ(G)::B(B)
- R(f);OGATE::QAR1(G),XR(f)
- P(i);N_SPINR(f),OGATE,P_PINQ(G)::QAR(G),XB(j)
- R(a);N_GUARD::QAR(G),XP(b)
- B(j);N_GUARD::S(H),XP(i)
- P(i);OGATE,P_PINQ(G)::QAR(G),XB(j)
- Refutation
- R(a);CHECK
- Try
- B(B);XR(f)
- Threat
- QAR(G)+B(B),DCHECK
- Vars
- R(a);N_GUARD,XB(A)::QAR(G),XP(b)
- P(i);OGATE,P_PINQ(G)::QAR(G),XB(j)
- Refutation
- R(a);CHECK
- Try
- R(D);
- Threat
- B(B)
- Vars
- R(a);N_GUARD,XB(A)::QAR(G),XP(b)
- R(f);OGATE::QAR1(G),XR(f)
- P(i);N_SPINR(f),OGATE,P_PINQ(G)::QAR(G),XB(j)
- R(a);N_GUARD::QAR(G),XP(b)
- R(a);N_GUARD,P_PINB(B)::QAR(G),XP(b)
- Refutation
- P(g);XR(D)
- Try
- Actual
- Q(G);N_PINR(f),P_SPINQ(G),XP(i)
- Threat
- QAR(G),XB(j)
- Vars
- R(f);CHECK,N_GUARD::S(H),XR(f)
- B(j);CHECK,XQ(G)::S(H),XB(j)
- R(f);OGATE,XS(I)::B(B)
- R(f);N_PINQ(G)::QAR1(G)
- R(f);OGATE::B(B)
- B(j);N_PINQ(G)::QAB1(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).