MESON Chess Problem Database

Problem Display
PID: 233206 (r2RR3/2P3p1/r2BB1K1/8/NN1k2p1/1P3P2/1nPPP3/1nqQ2b1 w - - 0 1)

Lindner, Erich

Freie Presse, 1975

r2RR3/2P3p1/r2BB1K1/8/NN1k2p1/1P3P2/1nPPP3/1nqQ2b1

#2

14 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc2+
      • 2.Sxc2#
    • 1...Rxa4
      • 2.Sc6#
    • 1...Ra5
      • 2.Sc6#
    • 1...Rc6
      • 2.Sxc6#
    • 1...Rxd6
      • 2.Sc6#
    • 1...R6a7
      • 2.Sc6#
    • 1...Bh2
      • 2.e3#
  • Tries
    • 1.Bh2+?
      • 1...Rd6
        • 2.Sc6#
        • 2.Rxd6#
      • 1...Rxd8!
    • 1.Bg3+?
      • 1...Rd6
        • 2.Sc6#
        • 2.Rxd6#
      • 1...Rxd8!
    • 1.Bf4+?
      • 1...Rd6
        • 2.Sc6#
        • 2.Rxd6#
      • 1...Rxd8!
    • 1.Bf8+?
      • 1...Rd6
        • 2.Sc6#
        • 2.Bxg7#
      • 1...Rxd8
        • 2.Bxg7#
      • 1...Ke5!
    • 1.Bc4?
      • threat
        • 2.Re4#
      • 1...Qxc2+
        • 2.Sxc2#
      • 1...Rxd6+
        • 2.Rxd6#
      • 1...Sc3
        • 2.dxc3#
      • 1...gxf3!
    • 1.Bxg4?
      • threat
        • 2.Re4#
      • 1...Rxd6+
        • 2.Rxd6#
      • 1...Sc3
        • 2.dxc3#
      • 1...Qxc2+!
    • 1.Bf7?
      • threat
        • 2.Re4#
      • 1...Qxc2+
        • 2.Sxc2#
      • 1...Rxd6+
        • 2.Rxd6#
      • 1...Sc3
        • 2.dxc3#
      • 1...gxf3!
    • 1.Bg8?
      • threat
        • 2.Re4#
      • 1...Qxc2+
        • 2.Sxc2#
      • 1...Rxd6+
        • 2.Rxd6#
      • 1...Sc3
        • 2.dxc3#
      • 1...gxf3!
  • Keys
    • 1.Bf5!
      • threat
        • 2.Re4#
      • 1...Rxd6+
        • 2.Rxd6#
      • 1...Qxc2
        • 2.Qxg1#
      • 1...Sc3
        • 2.dxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • Q(b);CHECK,XP(B)::S(H),XQ(b)
    • R(g);N_GUARD,XS(G)::S(H)
    • R(g);N_GUARD::S(H)
    • R(g);N_GUARD::S(H),XR(g)
    • R(g);N_GUARD,P_PINB(J),P_SPINR(g),XB(I)::S(H)
    • B(c);N_GUARD::P(D)
  • Tries
    • Try
      • B(I);CHECK,P_SPINB(J)
      • Refutation
        • R(i);XR(M)
    • Try
      • B(I);CHECK,P_SPINB(J)
      • Refutation
        • R(i);XR(M)
    • Try
      • B(I);CHECK,P_SPINB(J)
      • Refutation
        • R(i);XR(M)
    • Try
      • B(I);CHECK,P_SPINB(J)
      • Vars
        • R(i);XR(M)::B(I),XP(h)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • B(J);P_SPINB(I)
      • Threat
        • R1(N)
      • Vars
        • Q(b);CHECK,XP(B)::S(H),XQ(b)
        • R(g);CHECK,OGATE,P_SPINR(g),XB(I)::R(M),XR(g)
        • S(a);OGATE::QAR(A)+P(C)DCHECK,XS(a)
      • Refutation
        • P(f);XP(F)
    • Try
      • B(J);P_SPINB(I),XP(f)
      • Threat
        • R1(N)
      • Vars
        • R(g);CHECK,OGATE,P_SPINR(g),XB(I)::R(M),XR(g)
        • S(a);OGATE::QAR(A)+P(C)DCHECK,XS(a)
      • Refutation
        • Q(b);CHECK,XP(B)
    • Try
      • B(J);P_SPINB(I)
      • Threat
        • R1(N)
      • Vars
        • Q(b);CHECK,XP(B)::S(H),XQ(b)
        • R(g);CHECK,OGATE,P_SPINR(g),XB(I)::R(M),XR(g)
        • S(a);OGATE::QAR(A)+P(C)DCHECK,XS(a)
      • Refutation
        • P(f);XP(F)
    • Try
      • B(J);P_SPINB(I)
      • Threat
        • R1(N)
      • Vars
        • Q(b);CHECK,XP(B)::S(H),XQ(b)
        • R(g);CHECK,OGATE,P_SPINR(g),XB(I)::R(M),XR(g)
        • S(a);OGATE::QAR(A)+P(C)DCHECK,XS(a)
      • Refutation
        • P(f);XP(F)
  • Actual
    • B(J);P_SPINB(I)
    • Threat
      • R1(N)
    • Vars
      • R(g);CHECK,OGATE,P_SPINR(g),XB(I)::R(M),XR(g)
      • Q(b);N_GUARD,N_PINB(I),P_PINB(J),XP(B)::QAB(A),XB(c)
      • S(a);OGATE::QAR(A)+P(C)DCHECK,XS(a)
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