MESON Chess Problem Database

Problem Display
PID: 137487 (K3Q3/pNp1N3/1P2k1P1/R2n2p1/p2P4/1R4pb/B2pr1q1/8 w - - 0 1)

Ellerman, Arnoldo

Magyar Sakkvilag, 1936

K3Q3/pNp1N3/1P2k1P1/R2n2p1/p2P4/1R4pb/B2pr1q1/8

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Qf7#
    • 1...Bf5
      • 2.Sxd5#
    • 1...Sc3
      • 2.Sg8#
    • 1...Se3
      • 2.Sg8#
    • 1...Sb4
      • 2.Sg8#
    • 1...Sf4
      • 2.Sg8#
    • 1...Sxb6+
      • 2.Rxb6#
    • 1...Sf6
      • 2.Re3#
    • 1...Sxe7
      • 2.Rf3#
  • Tries
    • 1.Sc5+?
      • 1...Kf6
        • 2.Qf7#
        • 2.Qf8#
      • 1...Kd6!
    • 1.Sd8+?
      • 1...Kf6
        • 2.Qf7#
        • 2.Qf8#
      • 1...Kd6!
    • 1.Sf5+?
      • 1...Kf6
        • 2.Qf7#
      • 1...Se7
        • 2.Qxe7#
      • 1...Kxf5!
    • 1.Sc6+?
      • 1...Kf6
        • 2.Qf7#
      • 1...Se7
        • 2.Rf3#
        • 2.Qxe7#
      • 1...Kf5!
    • 1.Sc8+?
      • 1...Kf6
        • 2.Qf7#
      • 1...Se7
        • 2.Rf3#
        • 2.Qxe7#
      • 1...Kf5!
    • 1.Sg8+?
      • 1...Se7
        • 2.Re3#
        • 2.Rf3#
        • 2.Qxe7#
      • 1...Kf5!
    • 1.Rc3?
      • threat
        • 2.Rc6#
      • 1...Kf6
        • 2.Qf7#
      • 1...c6
        • 2.Rxc6#
      • 1...c5!
    • 1.Rf3?
      • threat
        • 2.Sxd5#
        • 2.Sc6#
        • 2.Sc8#
        • 2.Sg8#
        • 2.Bxd5#
      • 1...Bf5
        • 2.Sxd5#
        • 2.Sg8#
      • 1...Re5
        • 2.Sxd5#
        • 2.Sc6#
        • 2.Sc8#
        • 2.Sg8#
      • 1...c6
        • 2.Sxd5#
        • 2.Sxc6#
        • 2.Sc8#
        • 2.Sg8#
      • 1...Qxf3!
    • 1.Qg8+?
      • 1...Kf6
        • 2.Qf7#
      • 1...Kxe7
        • 2.Qf7#
      • 1...Kd7!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Rc6#
      • 1...Sxb6+
        • 2.Rxb6#
      • 1...Kf6
        • 2.Qf7#
      • 1...Sxe7
        • 2.Rf3#
      • 1...Sc3
        • 2.Sg8#
      • 1...Se3
        • 2.Sg8#
      • 1...Sb4
        • 2.Sg8#
      • 1...Sf4
        • 2.Sg8#
      • 1...Sf6
        • 2.Re3#
      • 1...c6
        • 2.Rxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(i);P-FLIGHT::QAR1(J)
    • B(e);SBLOCK::QAR(J)+S(H),XS(g)
    • S(g);N_GUARD,P_PINS(G)::QAR(J)+S(H)
    • S(g);CHECK,OGATE,P_PINS(G),XP(E)::B(A)+R(B),DCHECK,XS(g)
    • S(g);P_PINS(G),SBLOCK::B(A)+R(B),DCHECK
    • S(g);OGATEB,P_PINS(G),P_SPINS(g),XS(H)::B(A)+R(B)
  • Tries
    • Try
      • S(G);CHECK
      • Refutation
        • K(i);P-FLIGHT
    • Try
      • S(G);CHECK
      • Refutation
        • K(i);P-FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • K(i);P-FLIGHT::QAR1(J)
        • S(g);N_GUARD,P_PINS(G),P_SPINS(g)::QAR1(J),XS(g)
      • Refutation
        • K(i);P_SPINS(g),S_FLIGHT,XS(H)
    • Try
      • S(H);CHECK
      • Vars
        • K(i);P-FLIGHT::QAR1(J)
      • Refutation
        • K(i);P_SPINS(g),S_FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • K(i);P-FLIGHT::QAR1(J)
      • Refutation
        • K(i);P_SPINS(g),S_FLIGHT
    • Try
      • S(H);CHECK
      • Refutation
        • K(i);P_SPINS(g),S_FLIGHT
    • Try
      • R(B);P_PINS(g)
      • Threat
        • R(B)
      • Vars
        • K(i);N_SPINS(g),P-FLIGHT::QAR1(J)
        • P(k);::R(B),XP(k)
      • Refutation
        • P(k);
    • Try
      • R(B);P_PINS(g)
      • Threat
        • DUALS(5)
      • Refutation
        • Q(c);XR(B)
    • Try
      • Q(J);CHECK
      • Vars
        • K(i);P-FLIGHT::QAR1(J)
        • K(i);P-FLIGHT,XS(H)::QAR1(J)
      • Refutation
        • K(i);S_FLIGHT
  • Actual
    • R(D);
    • Threat
      • R(D)
    • Vars
      • S(g);CHECK,OGATE,P_PINS(G),XP(E)::B(A)+R(B),DCHECK,XS(g)
      • K(i);P-FLIGHT::QAR1(J)
      • S(g);OGATEB,P_PINS(G),P_SPINS(g),XS(H)::B(A)+R(B)
      • S(g);N_GUARD,P_PINS(G)::QAR(J)+S(H)
      • S(g);P_PINS(G),SBLOCK::B(A)+R(B),DCHECK
      • P(k);::R(D),XP(k)
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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).