MESON Chess Problem Database

Problem Display
PID: 263326 (5r2/4N1n1/3pp2Q/bppPkp2/1p3R2/1Rq2P2/1B1N1K2/7B w - - 0 1)

Lender, Baruch

Szachy, 1975

5r2/4N1n1/3pp2Q/bppPkp2/1p3R2/1Rq2P2/1B1N1K2/7B

#2

10 + 11

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb2
      • 2.Re3#
    • 1...Qd4+
      • 2.Re3#
    • 1...exd5
      • 2.Sc6#
  • Tries
    • 1.Rxc3?
      • threat
        • 2.Rc1#
        • 2.Rc2#
        • 2.Ra3#
        • 2.Rb3#
        • 2.Rd3#
        • 2.Re3#
        • 2.Rcc4#
        • 2.Rxc5#
      • 1...exd5
        • 2.Sc6#
        • 2.Re3#
        • 2.Rxc5#
      • 1...b3
        • 2.Re3#
      • 1...c4
        • 2.Re3#
        • 2.Rcxc4#
      • 1...bxc3!
    • 1.Rc4?
      • threat
        • 2.f4#
      • 1...Qd4+
        • 2.Re3#
      • 1...Sh5
        • 2.Qxe6#
      • 1...f4
        • 2.Re4#
      • 1...bxc4!
    • 1.Qg5?
      • threat
        • 2.Re4#
      • 1...Qd4+
        • 2.Re3#
      • 1...exd5!
    • 1.Qxg7+?
      • 1...Kxf4
        • 2.Qg3#
      • 1...Rf6!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Sc6#
      • 1...Qxd2+
        • 2.Rxd2#
      • 1...Qxd4+
        • 2.Re3#
      • 1...Qe3+
        • 2.Rxe3#
      • 1...Qxf3+
        • 2.Sxf3#
      • 1...Kxd4
        • 2.Qe3#
      • 1...cxd4
        • 2.f4#
      • 1...Rc8
        • 2.Qxg7#
      • 1...f4
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • Q(a);N_SPINQ(a),OGATE,P_PINS(C),XB(B)::R(E)
    • Q(a);CHECK,OGATE::R(E)
    • P(i);SBLOCK,XP(H)::S(J)
  • Tries
    • Try
      • R(E);XQ(a)
      • Threat
        • DUALS(8)
      • Vars
        • P(b);::B(B)+R(E),DCHECK
      • Refutation
        • P(b);P_SPINP(b),XR(E)
    • Try
      • R(G);
      • Threat
        • P(F)
      • Vars
        • Q(a);CHECK,OGATE::R(E)
        • S(j);N_GUARD::QAR1(I),XP(i)
        • P(g);N_GUARD::R1(G)
      • Refutation
        • P(d);XR(G)
    • Try
      • Q(I);P_PINP(g)
      • Threat
        • R1(G)
      • Vars
        • Q(a);CHECK,OGATE::R(E)
      • Refutation
        • P(i);XP(H)
    • Try
      • Q(I);CHECK,XS(j)
      • Vars
        • K(f);N_SPINQ(a),OGATEB,S_FLIGHT,XR(G)::QAB1(I)
      • Refutation
        • R(k);P_SPINR(k)
  • Actual
    • R(G);N_PINQ(a)
    • Threat
      • S(J)
    • Vars
      • Q(a);CHECK,OGATE,XS(C)::B(B)+R(G),XQ(a)
      • Q(a);CHECK,OGATE,P_SPINQ(a),XR(G)::R(E)
      • Q(a);CHECK,OGATE::R(E),XQ(a)
      • Q(a);CHECK,XP(F)::S(C),XQ(a)
      • K(f);N_GUARD,P_SPINQ(a),S_FLIGHT,XR(G)::QAB1(I)
      • P(e);SBLOCK,XR(G)::P(F)
      • R(k);N_GUARD::QAB(I),XS(j)
      • P(g);N_GUARD::R1(G)
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